. The American stationer. ire moving parts weigh seventons, through counterpoise and other expedientsthey can be operated at will by one man veryeasily. The circles are carefully and minutelydivided, and the obseiwer, while sitting in hischair can read any of them by means of a littletelescope attached to the side of the tube of themain telescope. A single gas lamp hung bygimbals at the end of the declination axis servesto light up each vernier and circle that may berequired to be read. The castings of which theframe is formed are about ten tons in clock-work is controlled by Mr. Gr
. The American stationer. ire moving parts weigh seventons, through counterpoise and other expedientsthey can be operated at will by one man veryeasily. The circles are carefully and minutelydivided, and the obseiwer, while sitting in hischair can read any of them by means of a littletelescope attached to the side of the tube of themain telescope. A single gas lamp hung bygimbals at the end of the declination axis servesto light up each vernier and circle that may berequired to be read. The castings of which theframe is formed are about ten tons in clock-work is controlled by Mr. Grubbsfrictional governor and his new electric controlapparatus. There are two right ascension circles,each two feet in diameter, one of which can beread from the eye end of the telescope, and theother from the ground floor. The declinationcircle is five feet in diameter, and is read fromthe eye end of telescope. This fine refractor isto be placed in the magnificent observatory ofVienna. COPYING PRESSES Letter and ESSES AND STANDS, Sizes an<l Styles —MANUFACTURED BY— SAML C. TATUM & CO, Cincinnati, Ohio. ILLUSTEATED CATALOGUE SENT UPONAPPLICATION.
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Keywords: ., bookcentury1800, bookdecade1870, bookidamericanstat, bookyear1873
