ary axles, parallel with the line of the poles, and The Current Supplement. in diameter and a focal distance of 65 feet, and its toothed rings; (2) the declination circle; (3) the The current SUPPLEMENT, No. 1212, is of exceptional its weight exceeds 44,000 pounds. It was therefore clockwork… … DETAILS OF THE GREAT TELESCOPE. 1. General view. 2. The siderostat. 3. The telescope. 4. The ocular. the tangent screw, for the displacements of the horary Roman Forum,” and deals largely with the recently under a cupola 209 feet in diameter, as this would circle, for the declination circle, and…
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