New Edition of Hints on Silver-Glass Reflecting Telescopes Manufactured by Mr. G. Calver, F.R.A.S. / with Directions for Silvering, Adjusting, &c.

The pamphlet offers practical guidance on silvered-glass reflecting telescopes, comparing reflectors and refractors and arguing for reflectors' advantages for planetary and lunar work; it explains mirror-making, testing and silvering procedures, mounting and adjustment (including alt-azimuth considerations), and best practices for observing and minimizing atmospheric or mechanical disturbances. It includes recommended observational tests and resolving limits for double stars, suggestions on suitable magnifications, and manufacturer's notes about workshop conditions and improvements in fabrication. Throughout it emphasizes careful workmanship, stable mounting, patient observing, and specific techniques to obtain and evaluate high defining power.