The practical astronomer : comprising illustrations of light and colours, practical descriptions of all kinds of telescopes, the use of the equatorial-transit, circular, and other astronomical instruments, a particular account of the Earl of Rosse's large telescopes, and other topics connected with astronomy
Thomas Dick's 1845 handbook of practical astronomy, published in London by Seeley, Burnside, and Seeley for amateur observers building and using telescopes. The wood-engraved figures are optical ray diagrams and instrument sections: lenses in cross-section with dotted light paths, lettered reference points, telescope tubes, mountings and eyepieces, useful as line-based technical schematics.
