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cavity_n of_o the_o pipe_n and_o so_o spoil_v the_o experiment_n which_o require_v that_o the_o oil_n within_o the_o pipe_n be_v keep_v in_o a_o entire_a and_o distinct_a body_n four_o common_a oil_n and_o water_n or_o any_o other_o two_o liquor_n that_o will_v not_o mingle_v may_v serve_v the_o turn_n in_o most_o of_o these_o experiment_n but_o we_o rather_o choose_v oil_n of_o turpentine_n because_o it_o be_v light_a and_o thin_a clear_a and_o colourless_a and_o may_v be_v easy_o have_v in_o quantity_n and_o be_v not_o so_o apt_a to_o spot_v one_o clothes_n or_o obstinate_o to_o adhere_v to_o the_o porous_a body_n it_o chance_v to_o fall_v on_o as_o common_z and_o other_o express_a oil_n and_o for_o their_o sake_n to_o who_o the_o odour_n be_v offensive_a we_o present_o correct_v it_o by_o mingle_v with_o it_o a_o convenient_a quantity_n of_o oil_n of_o rhodium_n or_o some_o other_o chemical_a oil_n that_o be_v odoriferous_a five_o oil_n of_o turpentine_n though_o it_o be_v not_o 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