12 MARCH 1892, Page 25

The Optics of Photography and Photographic Lenses. By T. Trail

Taylor. (Whittaker.)—After some preliminary chapters, in which the subjects of light, photographic definition, refraction, spheri- cal aberration, &c., are briefly treated, Mr. Taylor discusses in order, with a reference to their several inventors, the various lenses which are and have been used in photography, pointing out their advantages, Arc. Outsiders, and even amateurs, who have amused themselves with the art would hardly imagine how great an amount of scientific knowledge and technical ingenuity has been expended in this direction. The different species of lenses are very numerous, and the varieties almost innumerable. Mr. Taylor explains that his book is intended for the use of practising photographers.