12S6 " Journal of Applied Microscopy 



No. 1. 

 Giant cell sarcoma x 100. 

 Object, thin section, carmin stained. 

 Objective, 2/3 inch, achromatic. 

 Ocular, ordinary Huyghenian 11/2 inch. 

 Condenser, none, flat side of flame used. 

 Light, Acetylene gas flame, 1 foot burner. 

 Plate, Seed's Non-halation. 

 Screen, green glass. 



Exposure, six minutes (at least three times too short). 

 Developer, metol — quinol. 



No. 2. 

 Myxomatous tissue x 250. 

 Object, very thick section, deeply stained. 

 Objective, 1/6-inch achromatic. 

 Ocular, ordinary Huyghenian 2-inch. 

 Condenser, Abbe, iris diaphragm. 

 Light, Acetylene gas flame, 1 foot burner. 

 Plate, Wuestner's, "Jersey Beauty." 

 Screen, cobalt blue (Rainig's Moderator). 

 Exposure, 90 seconds. 

 Developer, eikonogen-hydroquinone. 

 Prints on Velox Glossy Paper. 



W. H. Walmsley. 



COMBINED UREOMETER AND SACCHAROMETER 



(IMPROVED.) 



FERMENTATION TUBES FOR BACTERIOLOGIC INVESTIGATIONS OF 



FERMENTATION. 



Further experiments with the Ureometer devised by the writer and described 

 in the Medical Record, 59: 12, 477, have shown that the evolution of gas from the 

 decomposition of the urine by the hypobromite can be greatly facilitated by using 

 the following modification : Instead of the test-tube for the hypobromite solu- 

 tion a small 50 c. c. flask is used. Twenty c. c. of the hypobromite solution are 

 put into the flask, the urine drawn up into the pipette, which is inserted into the 

 rubber stopper so that the end is well above the level of the hypobromite solution. 

 One c. c. of urine is then discharged into the latter. The evolution of gas takes 

 place at once, and the test is completed in a few minutes. The volume of air in 

 the flask displaced by the 1 c. c. of urine is deducted from the total volume gen- 

 erated, and in order to avoid calculations 1 c. c. of air space should be allowed 

 at the closed end of the graduated limb of the U tube and the graduations begin 

 at zero. The accompanying illustration shows the improved ureometer. 



