...(tig 13.) be the object, SV the reflecting furface, F the focus of parallel rays, arid С its centre. Through A and B, the extremities of the object, draw the lines СЕ, С R, which will be perpendicular to the furface ; and let the rajs AR. AG, be incident upon...

...the reflecting furface, ССсш F its principal focus, and С its centre. Through AY\, ц and В, draw the lines CE and CN, which will be perpendicular to the furface ; and let AR, AG, be a pencil of rays flowing from A. Thefc rays proceeding from a point beyond...

...156.) reprefent the objeft, SV the reflect ng furface, P its focus of parallel rays, and C its centre. Through A and B, the extremities of the object, draw...lines CE and CN, which will be perpendicular to the furface; anil let ARt AG, be a pencil of rays flowing from A. Tht-fe rays, proceeding from a point...

...Thus let AB be the object, 8V the reflecting sur• face', F' the principal focus, and С its centre. Through A and B, the extremities of the object, draw the lines CE, CR,' which will -be perpendicular to the surface; and let the rays AR, AG, be incident upon such points...

...(fig. 4) be the object, SV the reflecting surface, F the focus of parallel rays, and C its centre. Through A and B, the extremities of the object, draw the lines CE, CR, which will be perpendicular to the surface ; and let the rays AR, AG, be incident upon such points...

...AB represents the object, sv the reflecting surface, I its focus of parallel rays, and c its centre. Through A and B, the extremities of the object, draw the lines c B and cx, which are perpendicular to the surface, and let AB, A e, be a pencil of rays Bowing from...

...AB represents the object, sv the reflecting surface, F its focus of parallel rays, and c its centre. Through A and B, the extremities of the object, draw the lines c B and c H, which are perpendicular to the surface, and let A it, A c, be H pencil of rays flowing...