128 THE AMERICAN MONTHLY [Api-., 



taken by Dr. E. Cutter with the celebrated 1-75 inch objective. 

 For comparison, Dr. Reyburn showed a negative of blood taken 

 by tlie late Dr. Woodward with Zeiss 1-12 inch objective. 



Dr. V. A. Moore presented a paper upon Distinguishing the 

 Typhoid bacillus from the Bacillus coli. They cannot be dif- 

 ferentiated morphologically even with the aid of the microscope. 

 He has made extensive observations upon the flagellfc in the 

 hope to do so i)ut has failed. It is found however, that when 

 introduced into a 1 percent solution of glucose peptonized boui- 

 llon the B. coli causes fermentation with the formation of gas 

 and the tvphus does not. Fermentation tubes were exhibited 

 proving this fact. B3' request, Dr. Moore also described the 

 method of plate culture for isolating different species of bacteria 

 and of securing pure cultures for use in experimentation. He 

 exhibited the Bacillus of typhoid fever under the microscope. 



Dr. Alleger explained his method of testing suspected water 

 for typhoid germs. If water contained, as it might, a score of 

 other germs in connection with the typhoid, the plate-culture 

 method of separating them would require longandt^-dious opera- 

 tions. But it has been found that at a certain degree of tem- 

 perature many of these will remain inert, while with an acid 

 medium and temperature36°C. the typhus and only a very few 

 others will grow. By producing these conditions a great num- 

 V)er of liarmless species are eliminated from the work and the 

 method of linding the deadly typhus much shortened. 



NEW PUBLICATIONS. 



Investk/ations on Microscopic Foams and on Proto-plasin. By O. 

 . Butschi. 8° London, 1894. Price 18s. 



This is a translation by E. A. Minchin of Merton College, Ox- 

 ford. It covers experiments and observations directed towards 

 a solution of the question of the physical conditions of the phe- 

 nomena of life. Prof. Butschli discovered all gradations be- 

 tween scattered vacuoles and a completely alveolar or reticular 

 structure. He then succeeded in making foams which under 

 the microscope presented the reticulated appearance of i)roto- 

 plasm. He also discovered streaming movement and actual 

 progression in these foams. Properties heretofore attributed 

 only to living })rotoplasm are thus found in (living?) foam. 



