THE MANUFACTURE OF TELESCOPES. 387 



planets, and' even the brightest stars, are very well 

 defined. 



No. 2 has an aperture of 9^ inches, and a focal length 

 of 14 feet. It has 7 negative and 6 positive eye-pieces, 

 the highest magnifying power being 1000. The circles 

 are of the same size as in No. 1. This telescope was 

 sold to West Point Academy for $5000. 



No. 3 has an aperture of 9 inches, and a focal length 

 of 9 feet. The highest magnifying power is 600. This 

 telescope was sold to Mr. Eutherford, of New York, for 

 $2,200. It was made with an unusually short focus, to 

 accommodate the size of Mr. Eutherford's dome. The 

 performance of this telescope is highly satisfactory. 



No. 4 has a focal length of 11 feet, and an aperture 

 of 8 inches. It has twelve eye-pieces, the highest mag- 

 nifying 800 times. Price, with clock-work and mi- 

 crometer, $2,200; with plain mounting, $1,600. Mr. 

 Fitz has sold two telescopes of this size ; one to Mr. 

 William S. Vanduzee, of Buffalo, N. Y., the other to 

 the Friends' High School of West Haverford, Pa. 



No. 5 has a focal length of 8 feet, and an aperture of 

 6 j inches. Highest magnifying power 500. Price, with 

 clock-work and micrometer, $1,300. Mr. Fitz has sold 

 four telescopes of this size one to Lieutenant Gilliss, for 

 the use of the Chili expedition ; a second to Mr. Yan- 

 arsdale, of Newark, N. J. ; a third to South Carolina 

 College, Columbia, S. C. ; and a fourth to Dr. William 

 F. Hickock, of Burlington, Yt. 



No. 6 has a focal .length of 7 feet, and an aperture of 



