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Word A Word B Word C Word D Occurrence Frequency Band MI MI Band Prominent
cause_n bring_v good_a let_v 1,459 5 4.0417 3 false
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ID Title Author Corrected Date of Publication (TCP Date of Publication) STC Words Pages
A00429 The elements of geometrie of the most auncient philosopher Euclide of Megara. Faithfully (now first) translated into the Englishe toung, by H. Billingsley, citizen of London. Whereunto are annexed certaine scholies, annotations, and inuentions, of the best mathematiciens, both of time past, and in this our age. With a very fruitfull præface made by M. I. Dee, specifying the chiefe mathematicall scie[n]ces, what they are, and wherunto commodious: where, also, are disclosed certaine new secrets mathematicall and mechanicall, vntill these our daies, greatly missed; Elements. English Euclid.; Dee, John, 1527-1608.; Candale, François de Foix, comte de, 1502-1594.; Billingsley, Henry, Sir, d. 1606. 1570 (1570) STC 10560; ESTC S106699 1,020,889 884

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plato_n in_o his_o book_n call_v epinomis_n which_o book_n be_v the_o threasury_n of_o all_o his_o doctrine_n where_o his_o purpose_n be_v to_o seek_v a_o science_n which_o when_o a_o man_n have_v it_o perfect_o he_o may_v seem_v and_o so_o be_v in_o deed_n wise._n he_o brief_o of_o other_o science_n discourse_v find_v they_o not_o able_a to_o bring_v it_o to_o pass_v but_o of_o the_o science_n of_o number_n he_o say_v illa_fw-la qua_fw-la numerum_fw-la mortalium_fw-la generi_fw-la d●●n_fw-la id_fw-la profecto_fw-la efficiet●_n deum_fw-la antem_fw-la aliquem_fw-la magis_fw-la quam_fw-la fortunam_fw-la ●d_a sa●●tem_fw-la nostram_fw-la hoc_fw-la m●nus_fw-la nobis_fw-la arbitror_fw-la contulisse_fw-la etc_n etc_n nam_fw-la ipsum_fw-la ●onorum_fw-la omnium_fw-la authorem_fw-la cur_n non_fw-la maximi_fw-la boni_fw-la prudentiae_fw-la dico_fw-la causam_fw-la arbitramur_fw-la that_o science_n very_o which_o have_v teach_v mankind_n number_n shall_v be_v able_a to_o bring_v it_o to_o pass_v and_o i_o think_v a_o certain_a god_n rather_o than_o fortune_n to_o have_v give_v we_o this_o gift_n for_o our_o bliss_n for_o why_o shall_v we_o not_o judge_v he_o who_o be_v the_o author_n of_o all_o good_a thing_n to_o be_v also_o the_o cause_n of_o th●_z great_a good_a thing_n namely_o wisdom_n there_o at_o length_n he_o prove_v wisdom_n to_o be_v attain_v by_o good_a skill_n of_o number_n with_o which_o great_a testimony_n and_o the_o manifold_a profess_v and_o reason_n before_o expressed●_n you_o may_v be_v sufficient_o and_o full_o persuade_v of_o the_o perfect_a science_n of_o arithmetic_n to_o make_v this_o account_v that_o of_o all_o science_n ☞_o next_o to_o theologie_n it_o be_v most_o divine_a most_o pure_a most_o ample_a and_o general_a most_o profound_a most_o subtle_a most_o commodious_a and_o most_o necessary_a who_o be_v next_o sister_n be_v the_o absolute_a science_n of_o magnitude_n of_o which_o by_o the_o direction_n and_o aid_n of_o he_o who_o magnitude_n be_v infinite_a and_o of_o we_o incomprehensible_a i_o now_o
first_o set_v they_o also_o must_v needs_o be_v at_o the_o least_o commensurable_a in_o power_n the_o one_o to_o the_o other_o for_o forasmuch_o as_o their_o square_n be_v rational_a they_o shall_v be_v commensurable_a to_o the_o square_n of_o the_o rational_a line_n first_o set_v wherefore_o by_o the_o 12._o of_o this_o book_n they_o be_v also_o commensurable_a the_o one_o to_o the_o other_o wherefore_o their_o line_n be_v at_o the_o least_o commensurable_a in_o power_n the_o one_o to_o the_o other_o and_o it_o be_v possible_a also_o that_o they_o may_v be_v commensurable_a in_o length_n the_o one_o to_o the_o other_o for_o suppose_v that_o a_o be_v a_o rational_a li●e_z first_o set_v and_o let_v the_o line_n b_o be_v unto_o the_o same_o rational_a line_n a_o commensurable_a in_o power_n only_o that_o be_v incommensurable_a in_o length_n unto_o it_o let_v there_o be_v also_o a_o other_o line_n c_o commensurable_a in_o length_n to_o the_o line_n b_o which_o be_v possible_a by_o the_o principle_n of_o this_o book_n now_o by_o the_o 13._o of_o the_o ten_o it_o be_v manifest_a that_o the_o line_n c_o be_v incommensurable_a in_o length_n unto_o the_o line_n a._n but_o the_o square_n of_o the_o line_n a_o be_v commensurable_a to_o the_o square_n of_o the_o line_n b_o by_o supposition_n and_o the_o square_a of_o the_o line_n c_o be_v also_o commensurable_a to_o the_o square_n of_o the_o line_n b_o by_o supposition_n wherefore_o by_o the_o 12._o of_o this_o book_n the_o square_a of_o the_o line_n c_o be_v commensurable_a to_o the_o square_n of_o the_o line_n a._n wherefore_o by_o the_o definition_n the_o line_n c_o shall_v be_v rational_a commensurable_a in_o power_n only_o to_o the_o line_n a_o as_o also_o be_v the_o line_n b._n wherefore_o there_o be_v give_v two_o rational_a line_n commensurable_a in_o power_n only_o to_o the_o rational_a line_n first_o set_v and_o commensurable_a in_o length_n the_o one_o to_o the_o other_o here_o be_v to_o be_v note_v which_o thing_n also_o we_o before_o note_v in_o the_o definition_n that_o campane_n and_o other_o which_o follow_v he_o bring_v in_o these_o phrase_n of_o speech_n to_o call_v some_o line_n rational_a in_o power_n only_o cause_n and_o other_o some_o rational_a in_o length_n and_o in_o power_n which_o we_o can_v find_v that_o euclid_n ever_o use_v for_o these_o word_n in_o length_n and_o in_o power_n be_v never_o refer_v to_o rationality_n or_o irrationalitie_n but_o always_o to_o the_o commensurabilitie_n or_o incommensurablitie_n of_o line_n which_o pervert_v of_o word_n as_o be_v there_o declare_v have_v much_o increase_v the_o difficulty_n and_o obscureness_n of_o this_o book_n book_n and_o now_o i_o think_v it_o good_a again_o to_o put_v you_o in_o mind_n that_o in_o these_o proposition_n which_o follow_v we_o must_v ever_o have_v before_o our_o eye_n the_o rational_a line_n first_o set_v note_n unto_o which_o other_o line_n compare_v be_v either_o rational_a or_o irrational_a according_a to_o their_o commensurability_n or_o incommensurabilitie_n ¶_o the_o 16._o theorem_a the_o 19_o proposition_n a_o rectangle_n figure_n comprehend_v under_o right_a line_n commensurable_a in_o length_n be_v rational_a according_a to_o one_o of_o the_o foresay_a way_n be_v rational_a svppose_v that_o this_o rectangle_n figure_n ac_fw-la be_v comprehend_v under_o these_o right_a line_n ab_fw-la and_o bc_o be_v commensurable_a in_o length_n and_o rational_a according_a to_o one_o of_o the_o foresay_a way_n then_o i_o say_v that_o the_o superficies_n ac_fw-la be_v rational_a describe_v by_o the_o 46._o o●_n the_o first_o upon_o the_o line_n ab_fw-la a_o square_a ad._n construction_n wherefore_o that_o square_a ad_fw-la be_v rational_a by_o the_o definition_n demonstration_n and_o forasmuch_o as_o the_o line_n ab_fw-la be_v commensurable_a in_o length_n unto_o the_o line_n bc_o and_o the_o line_n ab_fw-la be_v equal_a unto_o the_o line_n bd_o therefore_o the_o line_n bd_o be_v commensurable_a in_o length_n unto_o the_o line_n bc._n and_o as_o the_o line_n bd_o be_v to_o the_o line_n bc_o so_o be_v the_o square_a dam_n to_o the_o superficies_n ac_fw-la by_o the_o first_o of_o the_o six_o but_o it_o be_v prove_v that_o the_o line_n bd_o be_v commensurable_a unto_o the_o line_n bc_o wherefore_o by_o the_o 10._o of_o the_o ten_o the_o square_a dam_n be_v commensurable_a unto_o the_o rectangle_n superficies_n ac_fw-la but_o the_o square_a dam_n be_v rational_a wherefore_o the_o rectangle_n superficies_n ac_fw-la also_o be_v rational_a by_o the_o definition_n a_o rectangle_n figure_n therefore_o comprehend_v under_o right_a line_n commensurable_a in_o length_n be_v rational_a accord_v to_o one_o of_o the_o foresay_a way_n be_v rational_a which_o be_v require_v to_o be_v prove_v proposition_n where_o as_o in_o the_o former_a demonstration_n the_o square_n be_v describe_v upon_o the_o less_o line_n we_o may_v also_o demonstrate_v the_o proposition_n if_o we_o describe_v the_o square_n upon_o the_o great_a line_n and_o that_o after_o this_o manner_n suppose_v that_o the_o rectangle_n superficies_n bc_o be_v contain_v of_o these_o unequal_a line_n ab_fw-la and_o ac_fw-la which_o let_v be_v rational_a commensurable_a the_o one_o to_o the_o other_o in_o length_n and_o let_v the_o line_n ac_fw-la be_v the_o great_a case_n and_o upon_o the_o line_n ac_fw-la describe_v the_o square_a dc_o then_o i_o say_v that_o the_o parallelogram_n bc_o be_v rational_a length_n for_o the_o line_n ac_fw-la be_v commensurable_a in_o length_n unto_o the_o line_n ab_fw-la by_o supposition_n and_o the_o line_n dam_n be_v equal_a to_o the_o line_n ac_fw-la wherefore_o the_o line_n dam_n be_v commensurable_a in_o length_n to_o the_o line_n ab_fw-la but_o what_o proportion_n the_o line_n dam_n have_v to_o the_o line_n ab_fw-la the_o same_o have_v the_o square_a dc_o to_o the_o para●lelogramme_n c●_n by_o the_o first_o of_o the_o six_o wherefore_o by_o the_o 10._o of_o this_o book_n the_o square_a dc_o be_v commensurable_a to_o the_o parallelogram_n cb._n but_o it_o be_v manifest_a that_o the_o square_a dc_o be_v rational_a for_o that_o it_o be_v the_o square_a of_o a_o rational_a line_n namely_o ac_fw-la wherefore_o by_o the_o definition_n the_o parallelogram_n also_o cb_o be_v rational_a moreover_o forasmuch_o as_o those_o two_o former_a demonstration_n seem_v to_o speak_v of_o that_o parallelogram_n which_o be_v make_v of_o two_o line_n of_o which_o any_o one_o may_v be_v the_o li●e_z first_o set_v which_o be_v call_v the_o first_o rational_a line_n from_o which_o we_o say_v ought_v to_o be_v take_v the_o measure_n of_o the_o other_o line_n compare_v unto_o it_o and_o the_o other_o be_v commensurable_a in_o length_n to_o the_o same_o first_o rational_a line_n length_n which_o be_v the_o first_o kind_n of_o rational_a line_n commensurable_a in_o length_n i_o think_v it_o good_a here_o to_o set_v a_o other_o case_n of_o the_o other_o kind_n of_o rational_a line_n of_o line_n i_o say_v rational_a commensurable_a in_o length_n compare_v to_o a_o other_o rational_a line_n first_o set_v to_o declare_v the_o general_a truth_n of_o this_o theorem_a and_o that_o we_o may_v see_v that_o this_o particle_n according_a to_o any_o of_o the_o foresay_a way_n be_v not_o here_o in_o vain_a put_v now_o then_o suppose_v first_o a_o rational_a line_n ab_fw-la let_v there_o be_v also_o a_o parallelogram_n cd_o contain_v under_o the_o line_n ce_fw-fr and_o ed_z which_o line_n let_v be_v rational_a that_o be_v commensurable_a in_o length_n to_o the_o ●irst_n rational_a line_n propound_v ab_fw-la howbeit_o let_v those_o two_o line_n ce_fw-fr and_o ed_z be_v diverse_a and_o unequal_a line_n unto_o the_o first_o rational_a line_n ab_fw-la then_o i_o say_v that_o the_o parallelogram_n cd_o be_v rational_a case_n describe_v the_o square_a of_o the_o line_n de_fw-fr which_o let_v be_v df._n first_o it_o be_v manifest_a by_o the_o 12._o of_o this_o book_n that_o the_o line_n ce_fw-fr &_o ed_z be_v commensurable_a in_o length_n the_o one_o to_o the_o other_o for_o either_o of_o they_o be_v suppose_v to_o be_v commensurable_a in_o length_n unto_o the_o line_n ab_fw-la but_o the_o line_n ed_z be_v equal_a to_o the_o line_n ef._n wherefore_o the_o line_n ce_fw-fr be_v commensurable_a in_o length_n to_o the_o line_n bf_o but_o 〈◊〉_d the_o line_n ce_fw-fr be_v ●o_o the_o line_n ●_o f_o ●o_o be_v the_o parallelogram_n cd_o to_o the_o square_a df_o by_o the_o first_o of_o the_o six_o wherefore_o by_o the_o 10._o of_o this_o book_n the_o parallelogram_n cd_o shall_v be_v commensurable_a to_o the_o square_a df._n but_o the_o square_a df_o be_v commensurable_a to_o the_o square_n of_o the_o line_n ab_fw-la which_o be_v the_o first_o rational_a line_n propound_v wherefore_o by_o the_o 12._o of_o this_o book_n the_o parallelogram_n cd_o be_v commensurable_a to_o the_o square_n of_o the_o line_n ab_fw-la but_o the_o square_n of_o
of_o be._n but_o that_o which_o be_v produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_a number_n of_o ce_fw-fr be_v suppose_v to_o be_v equal_a to_o the_o square_a number_n of_o be_v wherefore_o that_o which_o be_v produce_v of_o gb_o into_o bc_o together_o with_o the_o square_a number_n of_o ce_fw-fr be_v equal_a to_o that_o which_o be_v produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_a number_n of_o ce._n wherefore_o take_v away_o the_o square_a number_n of_o ce_fw-fr which_o be_v common_a to_o they_o both_o the_o number_n ab_fw-la shall_v be_v equal_a to_o the_o number_n gb_o namely_o the_o great_a to_o the_o less_o which_o be_v impossible_a wherefore_o that_o which_o be_v produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_a number_n of_o ce_fw-fr be_v not_o equal_a to_o the_o square_a number_n of_o be_v i_o say_v also_o that_o that_o which_o be_v produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_a number_n of_o ce_fw-fr be_v not_o less_o than_o the_o square_a number_n of_o be._n for_o if_o it_o be_v possible_a they_o shall_v it_o be_v equal_a to_o some_o square_a number_n less_o than_o the_o square_a number_n of_o be._n wherefore_o let_v the_o number_n produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_n of_o the_o number_n ce_fw-fr be_v equal_a to_o the_o square_a number_n of_o bf_o and_o let_v the_o number_n ha_o be_v double_a to_o the_o number_n df._n then_o also_o it_o follow_v that_o the_o number_n hc_n be_v double_a to_o the_o number_n cf_o so_o that_o hc_n also_o be_v divide_v into_o two_o equal_a part_n in_o fletcher_n and_o therefore_o also_o the_o number_n which_o be_v produce_v of_o hd_a into_o bc_o together_o with_o the_o square_a number_n of_o fc_n be_v equal_a to_o the_o square_a number_n of_o the_o number_n bf_o but_o by_o supposition_n the_o number_n which_o be_v produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_a number_n of_o ce_fw-fr be_v equal_a to_o the_o square_a number_n of_o bf_o wherefore_o it_o follow_v that_o the_o number_n produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_a number_n of_o ce_fw-fr be_v equal_a to_o that_o which_o be_v produce_v of_o hb_o into_o bc_o together_o with_o the_o square_a number_n cf_o which_o be_v impossible_a for_o if_o it_o shall_v be_v equal_a then_o forasmuch_o as_o the_o square_n of_o cf_o be_v less_o than_o the_o square_a of_o ce_fw-fr the_o number_n produce_v of_o hb_o into_o bc_o shall_v be_v great_a than_o th●_z number_v produce_v of_o ab_fw-la into_o bc._n and_o so_o also_o shall_v the_o number_n hb_o be_v great_a than_o the_o number_n ab_fw-la when_o yet_o it_o be_v less_o than_o it_o wherefore_o the_o number_n produce_v of_o ab_fw-la into_o bc_o together_o with_o the_o square_a number_n of_o ce_fw-fr be_v not_o less_o than_o the_o square_a number_n of_o ●_o e._n and_o it_o be_v also_o prove_v that_o it_o can_v be_v equal_a to_o the_o square_a number_n of_o be_v neither_o great_a than_o it_o wherefore_o that_o which_o be_v produce_v of_o ab_fw-la into_o bc_o add_v to_o the_o square_a number_n of_o ce_fw-fr make_v not_o a_o square_a number_n and_o although_o it_o be_v possible_a to_o demonstrate_v this_o many_o other_o way_n yet_o this_o seem_v to_o we_o sufficient_a lest_o the_o matter_n be_v over_o long_o shall_v seem_v to_o much_o tedious_a ¶_o the_o 6._o problem_n the_o 29._o proposition_n to_o find_v out_o two_o such_o rational_a right_a line_n commensurable_a in_o power_n only_o that_o the_o great_a shall_v be_v in_o power_n more_o than_o the_o less_o by_o the_o square_n of_o a_o right_a line_n commensurable_a in_o length_n unto_o the_o great_a let_v there_o be_v put_v a_o rational_a line_n ab_fw-la and_o take_v also_o two_o such_o square_a number_n cd_o and_o de_fw-fr construction_n that_o their_o excess_n ce_fw-fr be_v not_o a_o square_a number_n by_o the_o corollary_n of_o the_o first_o assumpt_n of_o the_o 28._o of_o the_o ten_o and_o upon_o the_o line_n ab_fw-la describe_v a_o semicircle_n afb_o and_o by_o the_o corollary_n of_o the_o 6._o of_o the_o ten_o as_o the_o number_n dc_o be_v to_o the_o number_n ce_fw-fr so_o let_v the_o square_n of_o the_o line_n basilius_n be_v to_o the_o square_n of_o the_o line_n af._n demonstration_n and_o draw_v a_o line_n from_o fletcher_n to_o b._n now_o for_o that_o as_o the_o square_n of_o the_o line_n basilius_n be_v to_o the_o square_n of_o the_o line_n of_o so_o be_v the_o number_n cd_o to_o the_o number_n ce_fw-fr therefore_o the_o square_a of_o the_o line_n basilius_n have_v to_o the_o square_n of_o the_o line_n of_o that_o proportion_n that_o the_o number_n cd_o have_v to_o the_o number_n ce._n wherefore_o the_o square_a of_o the_o line_n basilius_n be_v commensurable_a to_o the_o square_n of_o the_o line_n of_o by_o the_o 6._o of_o the_o ten_o but_o the_o square_n of_o the_o line_n ab_fw-la be_v rational_a wherefore_o also_o the_o square_a of_o the_o line_n of_o be_v rational_a wherefore_o also_o the_o line_n of_o be_v rational_a and_o forasmuch_o as_o the_o number_n cd_o have_v not_o unto_o the_o number_n ce_fw-fr that_o proportion_n that_o a_o square_a number_n have_v to_o a_o square_a number_n therefore_o neither_o also_o have_v the_o square_a of_o the_o line_n ab_fw-la to_o the_o square_n of_o the_o line_n of_o that_o proportion_n that_o a_o square_a number_n have_v to_o a_o square_a number_n wherefore_o by_o the_o 9_o of_o the_o ten_o the_o line_n ab_fw-la be_v unto_o the_o line_n of_o incommensurable_a in_o length_n wherefore_o the_o line_n of_o and_o ab_fw-la be_v rational_a commensurable_a in_o power_n only_o and_o for_o that_o as_o the_o number_n dc_o be_v to_o the_o number_n ce_fw-fr so_o be_v the_o square_a of_o the_o line_n ab_fw-la to_o the_o square_n of_o the_o line_n of_o therefore_o by_o conversion_n or_o everse_v proportion_n which_o be_v demonstrate_v by_o the_o corollary_n of_o the_o 19_o of_o the_o five_o as_o the_o number_n cd_o be_v to_o the_o number_n de_fw-fr so_o be_v the_o square_a of_o the_o line_n ab_fw-la to_o the_o square_n of_o the_o line_n bf_o which_o be_v the_o excess_n of_o the_o square_n of_o the_o line_n ab_fw-la above_o the_o square_n of_o the_o line_n of_o by_o the_o assumpt_n put_v before_o the_o 14._o of_o this_o book_n but_o the_o number_n cd_o have_v to_o the_o number_n de_fw-fr that_o proportion_n that_o a_o square_a number_n have_v to_o a_o square_a number_n wherefore_o the_o square_a of_o the_o line_n ab_fw-la have_v to_o the_o square_n of_o the_o line_n bf_o that_o proportion_n that_o a_o square_a num●er_n have_v to_o a_o square_a number_n wherefore_o by_o the_o 9_o of_o the_o ten_o the_o line_n ab_fw-la be_v commensurable_a in_o length_n unto_o the_o line_n bf_o and_o by_o the_o 47._o of_o the_o first_o the_o square_a of_o the_o line_n ab_fw-la be_v equal_a to_o the_o square_n of_o the_o line_n of_o and_o fb_o wherefore_o the_o line_n ab_fw-la be_v in_o power_n more_o than_o the_o line_n of_o by_o the_o square_n of_o the_o line_n bf_o which_o be_v commensurable_a in_o length_n unto_o the_o line_n ab_fw-la wherefore_o there_o be_v find_v out_o two_o such_o rational_a line_n commensurable_a in_o power_n only_o namely_o ab_fw-la and_o of_o so_o that_o the_o great_a line_n ab_fw-la be_v in_o power_n more_o than_o the_o less_o line_n of_o by_o the_o square_n of_o the_o line_n fb_o which_o be_v commensurable_a in_o length_n unto_o the_o line_n ab_fw-la which_o be_v require_v to_o be_v do_v ¶_o the_o 7._o theorem_a the_o 30._o proposition_n to_o find_v out_o two_o such_o rational_a line_n commensurable_a in_o power_n only_o cause_n that_o the_o great_a shall_v be_v in_o power_n more_o than_o the_o less_o by_o the_o square_n of_o a_o right_a line_n incommensurable_a in_o length_n to_o the_o great_a let_v there_o be_v put_v a_o rational_a line_n ab_fw-la and_o take_v also_o by_o the_o 2._o assumpt_n of_o the_o 28._o of_o the_o ten_o two_o square_a number_n ce_fw-fr and_o ed_z which_o be_v add_v together_o make_v not_o a_o square_a number_n and_o let_v the_o number_n ce_fw-fr and_o ed_z add_v together_o make_v the_o number_n cd_o construction_n and_o upon_o the_o line_n ab_fw-la describe_v a_o sencircle_v afb_o and_o by_o the_o corollary_n of_o the_o 6._o of_o the_o ten_o as_o the_o number_n dc_o be_v to_o the_o number_n ce_fw-fr so_o let_v the_o square_n of_o the_o line_n ab_fw-la be_v to_o the_o square_n of_o the_o line_n of_o and_o draw_v a_o line_n from_o fletcher_n to_o b._n and_o we_o may_v in_o like_a sort_n demonstration_n as_o we_o do_v in_o the_o former_a proposition_n prove_v that_o the_o line_n basilius_n and_o of_o be_v rational_a commensurable_a in_o power_n only_o and_o for_o that_o as_o the_o number_n dc_o be_v
this_o problem_n execute_v it_o be_v now_o easy_a to_o execute_v and_o that_o two_o way_n i_o mean_v to_o a_o the_o sphere_n give_v to_o make_v a_o upright_a cone_fw-mi in_o any_o proportion_n give_v between_o two_o right_a line_n for_o let_v the_o proportion_n give_v be_v that_o which_o be_v between_o x_o and_o y._n by_o the_o order_n of_o my_o addition_n upon_o the_o 2._o of_o this_o twelve_o book_n to_o the_o circle_n ekg_n make_v a_o other_o circle_n in_o that_o proportion_n that_o x_o be_v to_o you_o which_o let_v be_v z._n upon_o the_o centre_n of_o z_o rear_v a_o line_n perpendicular_a and_o equal_a to_o fl._n i_o say_v that_o the_o cone_fw-mi who_o base_a be_v z_o and_o the_o height_n equal_a to_o fl_fw-mi be_v to_o a_o in_o the_o proportion_n of_o x_o to_o y._n for_o the_o cone_n upon_o z_o by_o construction_n have_v height_n equal_a to_o the_o height_n of_o the_o cone_fw-it lekg_v and_o z_o by_o construction_n be_v to_o ekg●_n as_o x_o be_v to_o you_o wherefore_o by_o the_o 11._o of_o this_o twelve_o the_o cone_n upon_o z_o be_v to_o the_o cone_n lekg_v as_o x_o be_v to_o y._n but_o the_o cone_n lekg_n be_v prove_v equal_a to_o the_o sphere_n a._n wherefore_o the_o cone_n upon_o z_o be_v to_o a_o as_o x_o be_v to_o you_o by_o the_o 7._o of_o the_o five_o to_o a_o sphere_n give_v therefore_o we_o have_v make_v a_o cone_n in_o any_o proportion_n give_v between_o two_o right_a line_n second_o as_o x_o be_v to_o you_o so_o to_o fl_fw-mi let_v there_o be_v a_o four_o line_n by_o the_o 12._o of_o the_o six_o and_o suppose_v it_o to_o be_v w._n i_o say_v that_o a_o cone_fw-mi who_o base_a be_v equal_a to_o ekg_v and_o height_n the_o line_n w_n be_v to_o a_o as_o x_o be_v to_o y._n for_o by_o the_o 14._o of_o this_o twelve_o cones_fw-la be_v set_v on_o equal_a base_n be_v one_o to_o the_o other_o as_o their_o height_n be_v but_o by_o construction_n the_o height_n w_n be_v to_o the_o height_n fl_fw-mi a●_z x_o be_v to_o y._n wherefore_o the_o cone_n which_o have_v his_o base_a equal_a to_o ekg_v and_o height_n the_o line_n w_n be_v to_o the_o cone_n lekg_v as_o x_o be_v to_o y._n and_o it_o be_v prove_v that_o to_o the_o cone_n lekg_v the_o sphere_n a_o be_v equal_a wherefore_o by_o the_o 7._o of_o the_o five_o the_o cone_n who_o base_a be_v equal_a to_o ekg_v and_o height_n the_o line_n w_n be_v to_o a_o as_o x_o be_v to_o y._n therefore_o a_o sphere_n be_v give_v we_o have_v make_v a_o upright_a cone_fw-mi cone_n in_o any_o proportion_n give_v between_o two_o right_a line_n and_o before_o we_o make_v a_o upright_a cone_fw-mi equal_a to_o the_o sphere_n give_v wherefore_o a_o sphere_n be_v give_v we_o have_v make_v a_o upright_a cone_fw-mi equal_a to_o the_o same_o or_o in_o any_o other_o proportion_n give_v between_o two_o right_a line_n i_o call_v that_o a_o upright_a cone_fw-mi who_o axe_n be_v perpendicular_a to_o his_o base_a ¶_o a_o corollary_n of_o the_o first_o part_n of_o the_o demonstration_n it_o be_v evident_a a_o sphere_n be_v propound_v that_o a_o cone_n who_o base_a have_v his_o semidiameter_n equal_a to_o the_o diameter_n thereof_o and_o height_n equal_a to_o the_o semidiameter_n of_o the_o same_o sphere_n be_v equal_a to_o that_o sphere_n propound_v ¶_o a_o problem_n 2._o a_o sphere_n be_v give_v and_o a_o circle_n to_o rear_v a_o upright_a cone_n upon_o that_o circle_n as_o a_o base_a equal_a to_o the_o sphere_n give_v or_o in_o any_o proportion_n between_o two_o right_a line_n assign_v and_o the_o second_o part_n of_o this_o problem_n be_v thus_o perform_v suppose_v the_o proportion_n give_v to_o be_v that_o which_o be_v between_o x_o &_o y._n problem_n then_o as_o x_o be_v to_o you_o so_o let_v a_o other_o right_a line_n find_v be_v to_o the_o h●ight_n of_o fletcher_n which_o line_n let_v be_v g._n for_o this_o g_o the_o find_a height_n by_o construction_n be_v to_o the_o height_n of_o fletcher_n as_o x_o be_v to_o you_o do_v cause_n this_o cone_n which_o let_v be_v m_o upon_o c_o the_o circle_n give_v or_o a_o other_o to_o it_o equal_a due_o rear_v to_o be_v unto_o the_o cone_n fletcher_n as_o x_o be_v to_o you_o by_o the_o 14._o of_o this_o twelve_o but_o fletcher_n be_v prove_v equal_a to_o the_o sphere_n give_v wherefore_o m_o be_v to_o the_o sphere_n give_v as_o x_o be_v to_o y._n and_o m_o be_v ●eared_v upon_o the_o circle_n give_v or_o his_o equal_a wherefore_o a_o sphere_n be_v give_v &_o a_o circle_n we_o have_v rear_v a_o up●ight_a cone_fw-mi upon_o that_o give_v circle_n as_o a_o base_a equal_a to_o the_o sphere_n give_v or_o in_o any_o proportion_n between_o two_o right_a line_n assign_v which_o be_v require_v to_o be_v do_v ¶_o a_o problem_n 3._o a_o sphere_n be_v give_v and_o a_o right_a line_n to_o make_v a_o upright_a cone_fw-mi equal_a to_o the_o sphere_n give_v or_o in_o any_o other_o proportion_n give_v between_o two_o right_a line_n which_o make_v cone_n shall_v have_v his_o height_n equal_a to_o the_o right_a line_n give_v problem_n for_o the_o second_o part_n sinde_z a_o circle_n which_o shall_v have_v to_o the_o base_a of_o l_o any_o proportion_n appoint_v in_o ●ight_a line_n as_o the_o proportion_n of_o x_o to_o you_o which_o by_o my_o addition_n upon_o the_o second_o of_o this_o book_n you_o have_v learned_a to_o do_v then_o with_o the_o height_n equal_a to_o the_o height_n of_o l_o rear_v upon_o this_o last_o find_v circle_n which_o l●t_v be_v t_o as_o a_o base_a you_o shall_v satisfy_v the_o problem_n l●t_v that_o cone_n be_v v._o for_o this_o last_o cone_n v._o be_v to_o l_o as_o his_o base_a be_v to_o the_o base_a of_o l_o by_o the_o 11._o of_o this_o twelve_o but_o l_o be_v prove_v equal_a to_o the_o sphere_n give_v wherefore_o by_o the_o 7._o of_o the_o five_o this_o l●●t_a cone_n v_o have_v to_o r_o the_o sphere_n give_v that_o proportion_n which_o be_v between_o x_o and_o you_o assign_v and_o forasmuch_o as_o the_o height_n of_o this_o cone_n v_o be_v equal_a to_o the_o height_n of_o l_o and_o the_o height_n of_o l_o equal_a to_o saint_n the_o right_a line_n give_v by_o construction_n it_o be_v evident_a that_o a_o sphere_n be_v give_v &_o a_o right_a line_n we_o have_v make_v a_o upright_a cone_fw-mi equal_a to_o the_o sphere_n give_v or_o in_o any_o other_o proportion_n give_v between_o two_o right_a line_n which_o make_v cones_fw-la have_v their_o height_n equal_a to_o the_o right_a line_n give_v which_o ought_v to_o be_v do_v vuwilling_a i_o be_o to_o use_v thus_o many_o word_n in_o matter_n so_o plain●_n and_o ease_n ☜_o but_o this_o i_o think_v can_v not_o hinder_v they_o that_o by_o nature_n be_v not_o so_o quick_a of_o invention_n as_o to_o lead_v every_o thing_n general_o speak_v to_o a_o particular_a execution_n ¶_o a_o theorem_a 3._o every_o cylinder_n which_o have_v his_o base_a the_o great_a circle_n in_o a_o sp●er●_n &_o heith_n equal_a to_o the_o diameter_n of_o that_o sphere_n be_v sesquialtera_fw-la to_o that_o sphere_n also_o the_o superficies_n of_o that_o cylinder_n with_o his_o two_o base_n be_v sesquilatera_n to_o the_o superficies_n of_o the_o sphere_n and_o without_o his_o two_o base_n be_v equal_a to_o the_o superficies_n of_o that_o spher●_n suppose_v a_o sphere_n to_o be_v signify_v by_o a_o and_o a_o upright_o cylinder_n have_v to_o his_o base_a a_o circle_n equal_a to_o the_o great_a circle_n in_o a_o contain_v and_o his_o heith_n equal_a to_o the_o diameter_n of_o a_o let_v be_v signify_v by_o fg._n i_o say_v that_o fg_o be_v sesquialter_fw-la to_o a_o second_o i_o say_v that_o the_o crooked_a cylindrical_a superficies_n of_o fg_o together_o with_o the_o superfici●ces_n of_o his_o two_o opposite_a base_n be_v sesquialtera_fw-la to_o the_o whole_a superficies_n spherical_a of_o a._n three_o i_o say_v that_o the_o cylindrical_a superficies_n of_o fg_o omit_v his_o two_o opposite_a base_n be_v equal_a to_o the_o superficies_n of_o the_o spear_n a._n let_v the_o base_a of_o fg_o be_v the_o circle_n flb_n who_o centre_n suppose_v m_o and_o diameter_n fb_o and_o the_o axe_n of_o the_o same_o fg_o let_v be_v mh_o which_o be_v his_o heith_n for_o we_o suppose_v the_o cylinder_n to_o be_v upright_o and_o suppose_v h_o to_o be_v his_o top_n or_o vertex_fw-la forasmuch_o as_o by_o supposition_n mh_o be_v equal_a to_o the_o diameter_n of_o a._n let_v mh_o be_v divide_v into_o two_o equal_a part_n in_o the_o point_n n_o by_o a_o plain_a superficies_n pass_v by_o the_o point_n n_o and_o be_v parallel_n to_o the_o opposite_a base_n of_o fg._n by_o the_o thirteen_o of_o this_o twelve_o book_n it_o than_o follow_v that_o the_o cylinder_n fg_o be_v