Recognition oi- Pi. am lUfTiniioi.oGY in Europi- 341 



olo£;ists. In ISOS Vcranus A. Moorc sent to him the results of 

 his study of the " bacillus of the beet disease (IV Betae)" whicii 

 Smith had left with him. The next year Jones furnished by 

 rec]uest an opinion of a paper on " the beet organism . . . ema- 

 nating from Dr. Arthur's laboratory." Sturgis's recent paper on 

 "his R[acillus] hortulensis [appeared to be] interesting and a 

 good painstaking study." During the summer and autumn of 1900 

 Jones again wrote Smith concerning his researches and his paper 

 on Biicillus carotovorus. He completed part of his study at the 

 University of Michigan under Professor Newcombc, and in 1901 

 the Centrulblatt published his work. The year previously, H. A. 

 Harding, bacteriologist of the Geneva, New York, agricultural 

 experiment station, published, with bibliography, in the same 

 publication " the results of his study of the bacterial cabbage 

 disease, " Die schwarze Faulnis des Kohls und verwandter 

 Pflanzen, etc." 



Smith's bulletin 28, " The Cultural Characters of Fseudomonas 

 hyac'nithi, Ps. canipestris, Ps. pbaseoli, and Ps. Stetvarti four one- 

 flagellate yellow bacteria parasitic on plants," '"° was published by 

 the Division of Vegetable Physiology and Pathology on August 6, 

 1901. He enumerated and described " Other Species belonging to 

 this Group ": Ps. juglandis Pierce, " an economically serious dis- 

 ease in walnuts "; Ps. vascularum (N. A. Cobb), parasitic on sugar 

 cane in Australia and elsewhere; Ps. amaranti, new species, 

 occurring in Eastern United States on species of Amarantus, weeds 

 in fields; and Ps. malv ace arum, new species, parasitic on cotton 

 (Gossypium spp.) Arthur's and BoUey's Ps. dianthi, isolated from 

 carnations (Dianthus spp.), w^as listed, but no description offered, 

 since it was " now believed to be purely saprophytic," a conclusion 

 yet to be established by more thorough study of the cultural 

 characters. As to each of this list Smith said that " knowledge 

 of their cultural characters [was] more or less imperfect." Con- 

 cerning the two new species, he placed most of his confidence on 

 his description of Pseudomonas malvacearum. To this publication 

 he later attributed the naming of the organism.-^ 



His real study of the angular leaf-spot of cotton due to Bac- 



^"Centr. f. Bakt. II, 6(10): 305-313. 



*°U. S. Dep't of Agric, Gov"t Print. Office, op. cil., 153 pp. 



'^^ Intro, to Bact. Dis. of Plants, op. cit., 339. 



12 



