1895.] MICROSCOPICAL JOURNAL. 357 



mild form of the disease against the attacks of the non-attenua- 

 ted organism. It was applied in connection with fowl-cholera 

 and with swine erysipelas, also with anthrax. 



Among his early researches were those on crystals and wine 

 fermentation. Later he attacked the diseases of the silk worm. 



Professor Theodore Gill, of Washington, will he president 

 of the Zoological Section of the A. A. A. S. at its Buffalo meet- 

 ing which will commence Monday, August 24, 1896. D. S. 

 Kellicott of Columbus, Ohio, will be Secretary of the same sec- 

 tion. Professor Geo. F. Atkinson of Ithaca will be secretary of 

 the Botanical section. 



Forthcoming Books. — We are informed that a new edition 

 of "Gosse's Evenings at the Microscope" is being prepared by 

 Prof. F. JeffreyBell. " Milk ; its Nature and Composition," by 

 Dr. C. M. Aikman, will be published b}'- A. C. Black. • Lewis 

 Wright is preparing an illustrated "Popular Handbook to the 

 Microscope" to be published by the British Religious Tract 

 Society. 



The Deep Sea. — The deepest sounding which has been 

 satisfactorily made in the ocean was near Japan, where 4,655 

 fathoms were recorded. Recently the English ship Penguin 

 came upon a spot in lat. 23° 40' S., long. 175° 10' W. which is 

 believed to be 245 fathoms deeper, but owing to an accident the 

 exact depth has not been determined. 



MICROSCOPICAL MANIPULATION. 



The Best Method of Sharpening a Microtome Knife. 



Dr. Lotsy thinks that Moll's method of sharpening microtome 

 knives is the best, as "it allows one to put the knife in good 

 shape inside of a iew minutes for any section he wants to cut. 

 Before using this method, any concavity of the knife-blade 

 must first be taken away. Dr. Moll uses a plate of polished 

 glass, which is fixed in a piece of wood, and two different pow- 

 ders, viz. — Vienna chalk and diamantine. A paste is made of 

 one of these powders and put upon the glass ; then the knife 



