Febkuaky 9, 1906.] 



SCIENCE. 



205 



stains, staining with *the acid fuelisine of 

 Anerbach. 



The cytoplasm undergoes changes in 

 structure as secretion progresses, first be- 

 coming vacuolar, then slightly granular, 

 still taking plasma stains, and finally 

 densely granular staining with the nuclear 

 dyes. There is evidence to indicate that 

 the cytoplasmic changes are controlled by 

 the nucleus. 



The nucleus seems to be the center of 

 metabolic activities participating in the 

 formation of the secretion substance, but 

 playing a passive role in the actual process 

 of secretion or extrusion of material from 

 the cell. 



The following are the titles of papers 

 presented at a joint meeting of the section 

 and the American Mycological Society: 

 Some Reasons for Desiring a Better Classi- 

 fication of the TJredinales : J. C. Arthur. 

 Uredinece of the Gulf States: S. M. Tracy. 

 North American Gill Fungi: F. S. Earle. 

 Lichens and Recent Conceptions of Spe- 

 cies: Bruce Pink. (By title.) 

 Cultures of Colletotrichum and Glceospo- 



rium: P. H. Rolfs. 

 The Affinities of the Fungus of Loliiim 



temulentum: E. M. Freeman. 

 Peridermium cereirum Peck and Cronar- 

 tium Quercum (Berkeley) : C. L. Shear. 



Ramularia: An Illustration of the Present 

 Practise in Mycological Nomenclature: 

 C. L. Shear. 



Notes on Pachynia cocos: P. H. Rolfs. 



Penicillium glaucum on Pineapple Fruits: 

 P. H. Rolfs. 



The Occurrence of Fusoma parasiticum 

 Titbuef in this Country: Perley Spald- 

 ing. 



Some Peculiar Fungi New to America: 

 W. G. Farlow. 



Francis E. Lloyd, 



Secretary. 



SOCIETY OF AMERICAN BACTERIOLOGISTS. 



The seventh annual meeting of the So- 

 ciety of American Bacteriologists was held 

 in the New Medical Building, University 

 of Michigan, December 28 and 29, 1905. 



Professor Edwin 0. Jordan, president of 

 the society, gave the introductory address 

 on 'Variation in Bacteria.' 



The following papers were presented : 



Preliminary Communication upon a Spiro- 

 chcetal Infection of White Bats, and Ob- 

 servations upon the Multiplication of the 

 Spirochetes in Fluid Medium: Drs. 

 ISToRRis, Pappenheimer and Flourney, 

 Pathological Laboratory, Bellevue Hos- 

 pital, New York. 



With the blood of a case of relapsing 

 fever, the authors were able to inoculate 

 successfully monkeys and white rats. The 

 following is a summary of the results ob- 

 tained : 



1. A subcutaneous inoculation in white 

 rats, Avith blood containing spirochetes, is 

 followed in the course of two or three days 

 by the presence of more or less numerous 

 spirochfetes in the circulating blood. These 

 persist from one to three days. 



2. Unlike the spirochffital infection of 

 man and monkej's, no relapses occur. 



3. The rats show no obvious symptoms 

 of illness, no local reaction, no visceral 

 lesions of consequence, save turgescence 

 and enlargement of the spleen. 



4. In all, a series of about twenty-five 

 generations have been kept alive through 

 rats. 



5. Observations show that immunity is 

 conferred by previous infection. Inocula- 

 tion of spirochetal blood, plus small doses 

 of serum from animals that have gone 

 through a previous infection, retards, or 

 completely inhibits, the development of the 

 spirochfetfe in the circulating blood of rats. 

 Subcutaneous inoculation of serum, fol- 



