November 17, 1922] 



SCIENCE 



563 



special dyes for toiological purposes. The Na- 

 tional Aniline Companj' puts out an especially 

 long list, so much so that this department of 

 the eompiany deserves to be considered with the 

 specialists in hiological stains 'to be mentioned 

 below. Three other basic manufacturers — • 

 Dicks, David and Co., Varick and N. Moore 

 Streets; Heller and Merz, 505 Hudson Street, 

 New York City; McAndrews and Forbes, Cam- 

 den, New Jersey — have shown a great deal of 

 interest in the work and put on the market 

 certain products that deserve to rank with the 

 biological dyes and are handled by all the con- 

 cerns mentiioned below. 



The specialists in biological stains either 

 manufacture their products from the inter- 

 mediates or else, whenever they know of a good 

 source of some dye, buy it of the basic manu- 

 facturers and see that it comes up to their tests. 

 This was and probably still is the function of 

 Griibler and Holburn in Germany. The do- 

 mestic concerns falling in this list that are at 

 present in the business are : 



Coleman and Bell, Norwood, Ohio. 



Empire Biochemical Co., 920 Whitlock Avenue, 

 New York City. 



Harmer Laboratories, Lansdowne, Pa. 



D. H. Pond, Blaekstone Bldg., Cleveland, Ohio. 



Providence Chemical Co., Providence, E. I. 



as well as the Pharmaceutical Division of the 

 National Aniline and Chemical Companj', as 

 mentioned above. 



The last mentioned concern needs a further 

 word of explanation because of a certain mis- 

 undei-standing that is prevalent. In some of 

 the earlier tests made by a committee of the 

 Bacteriological Society, National Aniline prod- 

 ucts were listed, and they rank rather un- 

 favorably. These, however, were the textile 

 dyes, the only ones then sold by this com- 

 pany. The company has since then decided to 

 specialize in biological stains and their present 

 line of stains is entirely different from those 

 mentioned in the earlier report. Another mis- 

 understanding comes from the fact that when 

 the Heyl laboratories failed. Dr. Heyl entered 

 the employ of the National Aniline and Chemi- 

 cal Co., and the latter concern began market- 

 ing biological stains. This naturally gave rise 



to the impression that the National Aniline Co. 

 has taken over the Heyl Laboratories. Such 

 is not the case, however, and the National Ani- 

 line line is distinctly different from those pre- 

 viously marketed by the Heyl Laboratories. 



The third class of fu-ms mentioned above 

 needs very little mention here because they aie 

 quite well known to the biologist. Some of 

 these laboratory supply houses like Central 

 Scientific Co., A. H. Thomas 'Co., and E. Leitz 

 Co. buy some one line of stains from the spe- 

 cialists in that line and advertise this fact; 

 others buy dyes from the basic manufacturer's 

 and sell them as stains under their own name. 

 Among the latter the Will Corporation de- 

 serves special mention beoause in the past they 

 have manufactured stains where necessary and 

 have standardized those that they have bought 

 exactly as done by the specialists listed above. 

 They are at present, however, stopping the 

 manufacture of these products, now that sat- 

 isfactory American stains are readily obtain- 

 able. 



This article is published in the hope that it 

 will assist usei-s of stains in understanding the 

 market and buying intelligently. All the con- 

 cerns mentioned as dealing particularly in this 

 line of business have -given the committee 

 hearty cooperation and are doings their best 

 to market a satisfactory line of stains. 



H. J. Conn, Chairman 

 Commission on Standardization of 

 Biological Stains 



LOWERY LAYMON LEWIS 



The death of Dr. Lowery Laymon Lewis, of 

 ithe Oklahoma Agricultural and Mechanical 

 College and Experiment Station, on September 

 26, has taken from the institution and the edu- 

 cational circles of the state a faithful worker 

 and scientist whose loss will he keenly felt. 



Dr. Lewis was born at Newport, Tennessee, 

 on September 3, 1869. He received the B.S. 

 degree at the Texas Agricultural and Mechan- 

 ical College in 1893, and the M.S. in 1894 from 

 the same institution. His studies were con- 

 tinued at the Iowa State Colkge and in 1896 

 was granted the degree of D.V.M. During 

 that year he came to the Oklahoma Agrieul- 



