vRORS FOR TELESCOPES MADE 37 



" At Hath in my leisure boon," he says, "by way of 



amuseni' several 2- feet, 5- feet, 



7-fe -t, and 20-fcet Newtonian telescopes; 



besides others of the Gregorian form of S inches, 



u inches, is niches, 2 feet, 8 feet, 5 feet, and 10 feet 



focal length. My way was ... to have many mirrors 



of each sort cant Mi tli.-m all as well an I 



i . then tost-: th.- I, 



served ; the rest l.y to be repolished. In 



l an 200, 7-feet; 



't; and about 80, 20- f- < t mirrors, not to m : 

 thoju Gregorian form, or of the construction of 



its reflecting microscope, of which I also made 

 a great number. . . . The number of stands I invented 

 lieso telescopes it would not be easy to assign." 1 

 The story ho tells of this magnificent "atnusemeu 

 less racy than hia sister's, is far more wonderful. Could 

 these mirrors have been sold at the price- tiling 



the market, a large fortune would have rewarded the 

 maker, a it ul:- i<l. 



In ,Iun- 17. new departure of Herschel com- 



menced. Some of his pupils had 1< it li.it h ; concerts, 

 rioa, ami th< theatre were at an r live or 



sorrow," his sister write**, " I saw 



almo nl into a workhl A 



i was making a tube and stands of all 



i wing- room ; her In-other Alex;i 

 was "turning patterns, grinding glasses, and turning 

 eye-pieces " in a bedroom ; and while this manufactory 

 was in iU busiest u 1ml William Herechel was besides 

 composing glees, catches, anthems for winter const: 



:>c j. ul. lie rooms and the chapel, or holding 



itf. TV**., 1706, pp. 347-48. 



