Selected quad for the lemma: ground_n

Word A	Word B	Word C	Word D	Occurrence	Frequency Band	MI	MI Band	Prominent
ground_n	angle_n	line_n	right_a	2,182	5	9.6733	4	true

Text snippets containing the quad

ID	Title	Author	Corrected Date of Publication (TCP Date of Publication)	STC	Words	Pages
A51544	Mechanick dyalling teaching any man, though of an ordinary capacity and unlearned in the mathematicks, to draw a true sun-dyal on any given plane, however scituated : only with the help of a straight ruler and a pair of compasses, and without any arithmetical calculation / by Joseph Moxon ...	Moxon, Joseph, 1627-1691.	1668 (1668)	Wing M3009; ESTC R20066	27,959	54

a Clock and IV a Clock Hour Lines If you will have the half Hours and quarter Hours or any other devision of hours you must devide each six devisions of the Equinoctial into so many parts as you intend and by a straight Ruler laid to the Center of the Equinoctial and those devisions in the Equinoctial Circle make marks in the Line of Contingence as you did before for the whole Hour Lines and Lines drawn from the Center of the Plane through those marks shall be the sub-devisions of the Hours But you must remember to make all sub-devisions short Lines and near the verge of the Dyal Plane that you may the easier distinguish between the whole Hours and the parts of Hours as you may see in the Figure Having drawn the Hour Lines set the number of each Hour Line under it as you see in the Figure Last of all sit a Triangular Iron whose angular point being laid to the Center of the Dyal Plane one side must agree with the Substilar Line and its other side with the Stilar Line so is the Stile made And this Stile you must erect perpendicularly over the Substilar Line on the Dyal Plane and there fix it Then is your Dyal finished OPERAT. III. To describe an Erect Direct South Dyal YOU may know an Erect Direct South Plane by applying the North side of the Declinatory to it For then if the North end of the Needle hang directly over the North point of the Card in the bottom of the Box it is a South Plane but if it hang not directly over the North point of the Card it is not a Direct South Plane but Declines either East or West and that contrary to the pointing of the Needle Easterly or Westerly from the North point of the Card for if the North point of the Needle points Easterly the Plane Declines from the South towards the West if it point Westerly the Plane Declines from the South towards the East You may know if the Plane be truly Erect or upright by applying one of the sides AB or AD to it for then by holding the Center A upwards so as the Plumb-line play free in the Grove if the Line falls upon 0 or 90 the Plane is upright but if it hang upon any of the intermediate Degrees it is not upright but Inclines or Reclines If you find it Incline apply the side AB to it and see what number of Degrees the Plumb-line falls on for that number of Degrees counted from the side AB is the number of Degrees of Inclination If you find the Plane Reclines apply the side AD to it and see what number of Degrees the Plumb-line falls on for that number of Degrees counted from the side AD is the number of Degrees of Reclination These Rules being well understood may serve you to find the scituation of all other sorts of Planes But for the making a Dyal on this Plane you must first draw a Meridian Line through the middle of the Plane by applying a Plumb-line to the middle of it till the Plumbet hang quietly before it for then if the Plumb-line be black't for a white Ground or chalked for a dark Ground and strained as Carpenters do their Lines you may with one stroak of the string on the Plane describe the Meridian Line as A XII This Meridian is also the Substilar Line Then on the top of this Meridian Line as at A draw another Line athwart it to cut it at right Angles as VI VI for an East and West Line At the meeting of these two Lines on the top make your Center whereon describe a Semi-Circle on your Plane as large as you can which by the Meridian Line and the East and West Line will be devided into two Quadrants One of these Quadrants devide into 90 Degrees as you were taught Fol. 12. and from the Substilar Line count the Complement of the Poles Elevation which here at London where the Pole is elevated 51 ½ Degrees its Complement to 90 is 38 ½ Degrees and make there a mark as at E. Then on the Substilar Line chuse a point where you please as at F for the Line of Contingence to pass through which Line of Contingence draw as long as you can so as it may cut the Substilar Line at right Angles and from the point F in the Substilar Line measure the shortest distance between it and the Stilar Line and keeping one Foot of your Compasses still in the point F transfer that distance into the Substilar Line as at G then on the point G describe a Semi-Circle of the Equinoctial against the Line of Contingence which Semi-Circle devide into twelve equal parts as you were taught by the Example in the Horizontal Dyal Fol. 13. and by a straight Ruler laid to each of these Devisions and to the Center of the Semi-Circle make marks in the Line of Contingence by the side of the Ruler For straight Lines drawn from the Center of the Dyal Plane through these marks in the Contingent Line shall be the 12 Hour Lines before and after Noon Then mark your Hour Lines with their respective Numbers The Substilar or Meridian Line is XII from thence towards the right hand with I II III c. and from thence towards the left hand with XI X IX c. The Stile must be erected perpendicularly over the Substilar Line so as to make an Angle with the Dyal Plane equal to the Complement of the Poles Elevation viz. 38 ½ Degrees OPERAT. IV. To make an Erect Direct North Dyal THE Erect Direct North Dyal Stile and all is made by the same Rules changing upwards for downwards and the left side for the right the Erect Direct South Dyal is made for if the Erect Direct South Dyal be drawn on any transparent Plane as on Glass Horn or an oyled Paper and the Horizontal Line VI VI turned downwards and the Line VII mark't with V the Line VIII with IIII the Line V with VII and the Line IIII with VIII then have you of it a North Erect Direct Dyal All the other Hour Lines in this Dyal are useless because the Sun in our Latitude shines on a North Face the longest Day only before VI in the Morning and after VI at Night OPERAT. V. To describe an Erect direct East Dyal HAng a Plumb-line a little above the place on the Wall where you intend to make your Dyal and wait till it hang quietly before the Wall Then if the Line be rubbed with Chalk like a Carpenters Line you may by holding the Plumbet end close to the Wall and straining it pretty stiff strike with it a straight Line as Carpenters do This Line shall be a perpendicular as AB Then chuse a convenient point in this Perpendicular as at C for a Center whereon describe an occult Arch as DE This Arch must contain the number of Degrees of the Elevation of the Equinoctial counted between D and E which in our Latitude