Quertes. 219 
lime is mixed with Thames or Tyne mud (how much? And is the 
mud burnt before being mixed with the lime? And how is the 
mixing done ?), drzed (into what shape is it put before being dried, 
and how is the drying done ?), durned (is it raised to a red or white 
heat, and in what sort of kilns?) ground, (is this done with mill- 
stones or rollers?). What is the chemical composition of the 
lime, of the mud, and of the cement? What are the chemical 
reactions that take place? 1stly, When the lime is mixed with the 
mud? 2ndly, When the mixture is burned? rdly, After the 
cement is mixed with water and used ? S. 
431.—Foraminifera.—What is the best method to mount and 
prepare sample of unwashed, also washed bottom foraminifera ? 
&. 
432.—Mounting Specimens.—Will any reader kindly give 
detailed directions how I should moun¢ specimens in spirit and 
others in water of Mackerel food, ‘‘ Cayenne” Calanus Sp. ; 
Themisto bispinosa, and Themora longicornis ; and in glycerine or 
Canada balsam or opaque ? AG 
433.—Red Snow.—Will any reader give a clear account of 
Red Snow, Protococcus nivalis? Is ita plant? Hy. 
434.—Mounting in Alcohol.—What cement can be used with 
safety to finish objects mounted in alcohol ? Et; ECD 
435.—Glycerine Mount.—In specimens mounted in glycerine 
or glycerine jelly, finished with white zinc and a slight coating of 
asphalt, the glycerine is now oozing through. How can the 
enquirer best preserve the objects, so as to prevent running in 
or loss of the specimens ? F. M. S. 
436.—Metallic Soaps.—Can anyone give the paper or par- 
ticulars of the metallic soaps used for ringing, as recommended, I 
believe, by Professor W. H. Seaman, of Washington D.C. ? 
B.Sc. 
437.—Flies.—The other day a fly walked over a paper, and I 
noticed its body was covered with dlood-red spots of large size, as 
were some other specimens. What ftingus could this have been, 
or in what journal or paper can I find an account of it? J.S. 
438.—Teeth.—What is the best way to stain and prepare 
sections of teeth to show micro-organisms ? AL Wie 
439.—Leptothrix.—How do we prepare and obtain specimens 
of Leptothrix buccolis from the teeth or débris ? A. W. 
440.—Dermodex folliculorum.—Have any readers of this 
Journal ever been successful themselves in finding specimens of 
Dermodex folliculorum in the skin, by the method so often given 
in books ? 
