180 



THE ame:]^ican monthly. 



[September, 



soundness of his views will soon be 

 established beyond all reasonable doubt. 



In conclusion, Dr. Stallard gave a brief 

 account of what is known regarding the 

 bacillus of leprosy, showing it to be highly 

 probable, although not yet demonstrated, 

 that this organism is the cause, as well as 

 the invariable accompaniment, of the dis- 

 ease. 



The subject of the paper was further 

 elucidated by. means of engravings repre- 

 senting the appearance of the various 

 baciUi, their modes of growth, the methods 

 used in their artificial cultivation, etc. A 

 number of slides had been carefully pre- 

 pared, showing the bacilli of consumption 

 and of leprosy, and these were exhibited 

 under two microscopes, using a Powell & 

 Lealand oil immersion ^^ inch objective, 

 and a glycerin immersion \ by Tolles. 

 An authentic specimen of Koch's common 

 bacillus was also shown. 



— We have received from Mr. W. H. 

 Bulloch a photograph of a new micro- 

 scope stand, which he has recently de- 

 signed especially for lithological purposes. 

 There are some peculiar features about it, 

 and Mr. Bulloch has promised to write a 

 description of it for publication. Proba- 

 bly it is not too much to say this is the 

 most complete lithological stand made. 

 The price is $300. Mr. Bulloch has re- 

 cently furnished one of his largest stands 

 to the Army Medical Museum. 



NOTICES OF BOOKS. 



The Technology of Bacteria Investigation. 

 Explicit Directions for the Study of Bac- 

 teria, their culture, staining, mounting, 

 etc., according to the methods employed 

 by the most eminent investigators. By 

 Charles S. DoUey, M. D. Boston : S. E. 

 Cassino & Co. 1885. (Small 8vo, pp. 

 12 and 263.) 



This book is composed of such notes 

 and memoranda as would naturally be 

 brought together by a person long engaged 

 in collecting the current literature of a sub- 

 ject. In this respect the record is an ex- 

 cellent one. The author seems to have 

 consulted everything of value that has been 

 published on the subject, and given a brief 

 outline of the many different processes de- 

 scribed. For a person engaged in inves- 

 tigations of this kind, not possessing the 

 scattered literature of the subject, the work 

 will prove to be of value, as showing what 

 has been done. The processes, however, 

 are given in such a condensed form that 

 it is doubtful if they could generally be ap- 



plied successfully by a novice. However, 

 some of the more important methods are 

 given at length, and the others can easily 

 be found from the references. It is un- 

 questionably a valuable book for the in- 

 vestigator, and is evidently the result of 

 much labor on the part of the author very 

 carefully done. There are more typo- 

 graphical errors than should be found in 

 a book of its size. 



First Lessons in Amateur Photography . 

 A series of lectures delivered before the 

 senior class of the Montclair High School 

 by the principal, Randall Spaulding. 

 New York : Scovill Manufacturing Com- 

 pany, W. Irving Adams, agent. 1885. 

 (8vo, pp. 28.) 



Seven lectures covering the ground well, 

 by an author who is evidently well ac- 

 quainted with his subject. The informa- 

 tion given is precisely what the amateur 

 wants to know. We would recommend 

 this book in preference to some much 

 larger and more pretentious. 



Fourth Annual Report from the E. M. 



Museum of Geology and Archceology. 



June, 1885. The Princeton Press. 1885. 



(Pamphlet. 8vo, pp. 24.) 



Economy in type is perhaps laudable, 

 but one might reasonably protest that the 

 full name of a museum should be given 

 on the title-page of an annual report. 

 We are unable to say what the ' E. M. 

 Museum' may be. However, it belongs 

 to the College of New Jersey, and Prof.. 

 William Libbey, Jr., is the Director. In 

 addition to the usual records of specimens 

 received, etc., the report contains an ac- 

 count of the methods employed for hard- 

 ening, embedding, etc. It is a useful re- 

 port for reference by persons engaged in 

 biological work. 



Exchanges. 



[Exchanges are inserted in this column without 

 charge. They will be strictly limited to mounted ob- 

 jects, and material for mounting.] 



Diatomaceous clay from this place, and fine slides 

 of Foraminifera, for fine slides, material or back num- 

 bers of A. M. M. Journal. 



E. H. RICHARDS, 

 Woburn, Mass. 



Wanted : Well cleaned and selected Foraminifera, 

 for which cash will be paid or slides given. 



EDWARD G. DAY, 

 Riverside, Conn. 



Hundreds of varieties of fresh-water Algse, including 

 Volvox, Desmids, Rivularia, Draparnaldia, Tetra- 

 spora, &c., &c., for selected exchanges by list. 



J. M. ADAMS, 

 Watertown, Md. 



