London: Royal Society of London, 1828. Three Quarter Leather. First Edition. vi, 400, 10, 6 pp. 4to. Recent brown three quarter leather bindings with five raised bands at spine, burgundy title patch with gold embossed titling, gold lines offsetting bands, decorative stamp in each compartment without titling. Numerous folding plates that illustrate articles. Very Good.
Peter Barlow's (1776-1862) paper recounting his experiments in inserting fluid between lenses to increase the focus and magnification of telescope lenses. This style of lens is still used today.