75 ^ Correspondence. [December, 
Contrary to our usual custom we give replies to the queries of 
the following two correspondents : — 
1. “ Vesle.” — Dr. R. Angus Smith’s process for the detection 
of microbia in water is as follows : — In 100 grms. of distilled 
water, heated to +30° C., dissolve 2 to 5 grms. of very dry gela- 
tin in thin leaves, and 2 centigrms. of sodium phosphate. Filter 
and precipitate with fresh albumen. Take in a test-tube 25 c.c. 
of this solution ; add to it an equal volume of the water to be 
examined, and keep the tube thus filled for some minutes in 
water at +35 0 C., to effedt an intimate mixture. Stopper the 
tube with cotton-wool, and keep it for a few days in a warm 
room. 
2. R. M. D. — We have it on the authority of eminent counsel 
that no learned society is warranted in giving the title of 
“ Fellow ” to its members unless it is incorporated either under 
a Royal Charter or under a special Adt of Parliament. You 
have therefore no right to place the letters “ F x y ” after your 
name. 
