Boston, July 16, 1906.
To the Editor:
—The title page of "Pathology and Treatment of Glaucoma" by Priestley Smith, published by Churchill, London, 1891, states that the volume is a revised publication, with additions, of the Erasmus Wilson lectures, delivered at the Royal College of Surgeons of England, in March, 1889. This is interesting in view of the claims for priority as regards the gelatin method of preserving specimens in Prof. Watters' letter in The Journal, A. M. A., July 14, 1906. Smith's method may be briefly described somewhat as follows: Fixation by the bichromate method, freezing, bisecting and embedding in a glycerin or gelatin jelly, the latter being prepared by soaking gelatin in water (⅛), melting, and after adding the white of an egg, boiling and filtering. Glycerin, 8 parts, and 60 drops of 10 per cent. carbolic acid is then added. At page 183 of this monograph it