" Concave Achromatic Glass Lens, etc." Proceedings of tlie Royal Society. Peter Barlow, F.R.S., and G. Dollond, F.R.S., February and May 1834.

"Eclipse du 28 Juillet 1851, Relevee Heliographiquement," par MM. Vaillat et Thompson, avec un objectif sthenallatique de M. Porro. Compt. Rend. 1851.

Bulletin Soc. Franc, pp. 114-117, 1856. J. Porro.

"Enlarged Views by One Operation." British Journal of Photography, September 19, 1873. Editor, J. T. Taylor (The Use of the Opera Glass).

"A Novel Enlarging Lens" (Opera Glass). By J. T. Taylor, British Journal Almanac, 1877.

" Telescopic Photography Without a Telescope." Editorial comment on the author's lens. By J. T. Taylor, in the British Journal of Photography, October 16, 1891.

Dr. A. Meithe's independent work set forth in letter to British Journal of Photography, October 30, 1891.

" A New Telescopic Photographic Lens." A Paper read at the Camera Club, London, by the Author, December 10, 1891.

"A Compound Telephotographic Lens." A Paper read at the Camera Club by the Author, March 10, 1892.

Description of "A New Form of Telephotographic Lens." By the Author at the Photographic Society, April 30, 1892. ("The Progress Medal" of the now Royal Photographic Society was awarded in 1896.)

"The Telephotographic Lens." An illustrated pamphlet by the Author, August 1892. (Out of print.)

"Traite Encyclopedique de Photographic" Ch. Fabre. Pretn. Supplem. 1892.

" Ueber Fernphotographie." By A. Steinheil. Photo. Correspond. 1892.

"Telephotography." A Paper delivered at the Society of Arts by the Author. Published in the Journal, March 3, 1893. (Awarded the Society's Silver Medal.)

"Telephotographic Systems of Moderate Amplification." A pamphlet by the Author, 1893. (Out of print.)

"Teleobjective" Eder's Jahrbuch, 1893, p. 348. (Reference is here made to A. Duboscq's lens.)

"Gebrauchsanleitung fur Teleobjective." Von Dr. P. Rudolph (of the firm of Carl Zeiss, Jena), May 1896.

"Geschichte und Theorie des Photographischen Teleobjectivs." Dr. Von Rohr (of the firm of Carl Zeiss, Jena), April 1897.

"Das Fernobjective." Hans Schmidt, Berlin, April 1898.

"Stalking with the Camera." A series of illustrated articles in the Photogram. By R. B. Lodge. 1897.

"Telephotography Applied to Architecture." By E. Marriage, in the Photogram, January 1898.

"Des Services que peut rendre le Tele-Objective au point de vue Pictorial." By M. Demachy, Photo Club de Paris, in November 1898. An abstract appears in the Amateur Photographer, January 13, 1899.

"Telephotography." Illustrated. By Dr. E. J. Spitta, F.R.A.S., in Photography March 23, 1899.

Printed by Ballantyke, Hanson & Co London &* Edinburgh