402 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



little thymol is added, and the fluid is then allowed to inspissate by 

 evaporation by placing the vessel near a radiator. 



The author's procedure for mounting alga? is as follows : after 

 killing and fixing in the potassium-copper-acetate solution an equal 

 bulk of 10 p.c. glycerin is added ; the mixture is then allowed to 

 concentrate by evaporation in a warm place, protected from dust. It is 

 necessary to separate the alga; from all dirt, otherwise a precipitate of 

 copper oxide occurs. 



( 6)IMiscellaneous. 



Shake Apparatus.* — A. Wolff-Eisner has devised the apparatus 

 shown in the accompanying figure (fig. 69). It consists of an excentric- 



Fig. 69. 



ally moving carrier, by means of which the material to be mixed is 

 shaken right and left and up and down at an angle of about 23°, and 

 sideways movement being about 8°. Various holders (fig. 70) are shown 

 for receiving different kinds of flasks and test-tubes. The rotating 

 wheel may be attached to a small motor. 



* Centralbl. Bakt., lte Abt. Orig., xlix. (1909) p. 654. 



