610 experimp:nt station record. 



pis. i?). — Tlio antlior prosonts a condensed Hiimmarv of his various publications relat- 

 inj; lo tiu nature of l)a('tc'ria, including an account of experiments with the anthrax 

 bacillus undertaken for the purpose of deterniiniiifi; the behavior of this bacillus on 

 various culture media. When this organism was introduced into water containing 

 various (piantities of salt a considi'rable proportion of the bacilli were killed within 

 a short j)eriod. Certain differences in resisting power were observed in colonies 

 which had been cultivated on different media. 



The author presents arguments of a general nature and base<l on his experiments, 

 in favor of the proposition that bacteria are not necessarily the only cause of the 

 infectious diseases in which they are found, and that the spontaneous generation of 

 various species of bacteria, including the anthrax bacillus, is possil)le and is 

 freiiuently observed. 



Pathog-enic molds and mucormycoses in animals and man, G. J. BARxnELAT 

 (Arrh. I'arnait., 7 {190S), No. 1, pji. o-JlC, Ji(jf<. G:3). — A detailed critical review is 

 given of the literature of this subject in connection with a bibliography. A consid- 

 eral)le variety of species of molds have been found to be pathogenic to animals and 

 man, and descriptive and biological notes are given on all these species. In the sec- 

 ond part of the paper attention is given to the spontaneous and experimental 

 occurrence of mucormycoses. 



The author made numerous experiments for the purpose of ascertaining the 

 pathogenic properties of species of molds, and as the result of his studies came to the 

 following conclusions: Mycoses naturally fall into 2 groups according as they are 

 produced by a species of Aspergillus or Mucor. The species of which the virulence 

 for animals has been determined are Mucor corymbifer, M. ramosus, M. tnicJiisi, M. 

 regnieri, M. pusillus, Rhizomucor parasilicus, etc. Animal tissues attacked by patho- 

 genic molds are modified in a characteristic manner. The- infection by molds may 

 be secondary and follow a primary infection by some species of bacteria. 



The internal use of arsenic and iodid of potash was found useful in the treatment 

 of nearly all forms of infection from pathogenic molds. When the spores of these 

 molds were introduced into the veins of rabbits, guinea pigs, or chickens, the death 

 of the animal was brought about within a short time, the duration of the disease 

 depending upon the species of mold and the quantity of spores used. Not all internal 

 organs are equally affected by pathogenic molds. These organisms seem to exhibit 

 a decided preference for the kidneys, mesenteric ganglia, intestines, and striated 

 musculature. 



In acute cases the lesions in the kidneys are specially well marked in the convo- 

 luted tubules where the pathogenic mold is found in abundance. Subcutaneous 

 inoculation of spores of these molds produced merely a reaction in the number of 

 leucocytes, while intratracheal injection was without effect except in the case of 

 birds. Ingestion of the spores was likewise without effect, the whole digestive tube 

 remaining without any lesion. Diseases caused by pathogenic molds are not directly 

 contagious. 



The behavior of the pleuroperitoneal epithelium in surrounding' foreign 

 bodies during the process of healing, J. G. Monckeberg {Beitr. Path. Anat. u. 

 Allg. Path., 34 {1903), N'o. 3, j)p. 4S9-531). — The experimental animals employed by 

 the author were rabbits and guinea pigs. Intraperitoneal inoculations of lycopodium 

 spores were made and the effect of these spores upon the peritoneal epithelium was 

 studied. It appeared that during the process of healing the first demonstrable 

 change consisted in the loss of the epithelial layers and the simultaneous appearance 

 of a coagulable exudate and hematogenous wandering cells belonging to the type of 

 polymorphous leucocytes. It was observed that during degenerative processes fol- 

 lowing inflammation the epithelial cells of the serous membranes undergo a process of 

 proliferation and become motile more quickly than the connectivp tissue elements 

 of the serou3 coats. 



