266 



BACTERIA IN RELATION TO PLANT DISEASES. 



Becker, Christian. 



Price list of balances aiifl weights of precision. 

 Factory : New Rochelle, N. Y. ; New York office : 

 7 Maiden Lane. 



The Kny-ScheerEr Co., 225-233 Fourth avenue. New 

 York, 

 (i) Illustrated Catalogue of Surgical Instruments. 

 igo2, pp. Lvi, and pp. 1,001-1,061, 2,001-2,140, 

 3,001-3,192, 4,001-4,102, and 5,001-5,180. 

 (2) Aseptic Surgical Furniture and General Hos- 

 pital Supplies, 6 ed., 1902, pp. 232. Fully 

 illustrated. 

 E. H. SakgEnT, & Co., 143 and 145 Lake street, Chi- 

 cago. 

 Importers and makers of laboratory supplies, 

 price list of apparatus, chemicals, reagents, 

 tissue-stains, microscopical and bacteriological 

 supplies, etc. 

 James T. DoughEetv, 409 and 411 W. Fifty-ninth 

 street. New York. 

 Scientific apparatus. Sole United States agent for 

 Carl Reichert, Vienna, Austria, microscopes, 

 microtomes, and polarizing apparatus. 



The Voigtlaender & Son Optical Co., 137 W. 

 Twenty-third street, New York. 

 Collinear and telephoto lenses, porro prism binoc- 

 ulars, etc. 

 Warner & SwasEv, Cleveland, Ohio. 



Excellent binocular field glasses. 

 Charees J. Ross Co., 1525 Fairimount avenue, Phila- 

 delphia, Pa. 

 Excellent quality of drawing-board, heavily coated, 

 so as to permit of any number of erasures. Rec- 

 ommended by Dr. Roland Thaxter and by the 

 writer. 

 The Century Camera Co., Rochester, N. Y. 



E.xcellent cameras embodying many convenient, 

 time-saving devices. 

 Stanley Photographic Dry Plate Co. 



Cheap dry-plates of good quality. 

 M. A. Seed Dry Pl.ate Co., St. Louis, Mo. 

 Standard dry-plates. Non-curling films. Isochro- 

 matic, ordinary, and non-halation plates of good 

 quality. 

 Hammer Dry Plate Co., St. Louis, Mo. 

 Both Seed and Hammer publish interesting little 

 free handbooks on negative making, etc. 



G. Cramer Dry Plate Co., St. Louis, Mo. New 



York Depot : 32 East loth street. 

 Cadett Spectrum Dry Plate Co., London, England. 

 The Ilford Chromatic Plate Co., London, England. 

 The 31-4 by 41-^ plates are highly recommended by 

 Dr. Jeffrey for photomicrographic work. They 

 cost 20 cents per dozen, exclusive of duty. 

 The Eastman Kodak Co., Rochester, N. Y. 



Roll and cut films, Kodoid films, non-curling films, 

 solio paper, velox paper, etc. 



\\'iLLis and Clements, Philadelphia, Pa. 



Platinotype paper. 

 Dr. J. C. Miller, Denver, Colo. 



Blue-print papers of high grade, known as "French 

 Satin, Jr." 



G. GennerT, 24 and 26 East 13th street, New York. 

 Hauff's Ortol developer, white glass for lantern- 

 slide covers, etc. 



Mallinckrodt Chemical \Vorks, St. Louis, Mo and 

 New York, N. Y. 

 Photographic chemicals of a high grade. 

 Keuffel & Esser Co., New York. 



127 Fulton street and 42 Ann street. Catalogue 

 and price list of drawing materials and surveying 

 instruments. Drawing paper of any quality de- 

 sired converted into blue-print paper. Branches 

 in Chicago, St. Louis, and San Francisco. 



E. SchEring, manufacturing chemist, Berlin, Ger- 

 many. 



Kr.al's Laboratory, Prag, Austro-Hungary. 



Der gegenwartige Bestand der Kral'schen Samm- 

 lung von Mikroorganismen, Oct., 1902. Krai's Bac- 

 teriologisches Laboratorium. Prag, i, Kleiner Ring 

 II. Telegramm-Addresse : Krai's Laboratorium. 



Cultures of several hundred sorts of bacteria and 

 of some fungi may be had from this laboratory. 

 Authors are urged to send their new species to Krai. 



\V. P. Stender, Leipzig, Gerichtsweg 10. Fabrik 

 und Lager von Glasgegcnstaenden zur Anfertigung 

 mikroskopischer Praeparate, u. s. iw. 



Eagle Oxygen Co. 



(See p. 81.) 

 Defender Photo Supply Co., Rochester, N. Y. 



Argo and other photographic papers. 



