1884.] Microscopy and Histology. 749 
out the internal structure of diatoms, and believe that I can 
detect fine protoplasmic threads proceeding from the protoplasm 
that surrounds the nucleus and passing through apertures in the 
i I am not yet, however, in a position to demon- 
strate this with absolute certainty, but hope to do so soon.”— 
Four. of the Roy. Micros. Soc., Feb., 1884. 
Kittinc Hyproip ZOOPHYTES AND POLYZOA WITH THE TENTA- 
the polyzoon to 
be placed in a small beaker or clear glass bottle, and allowed to 
mens may be kept in ninety per cent of the same until required 
for mounting. Experiments with alcohol upon hydroid zo0- 
the whole of the water assumes a golden-yellow color. The re- 
ae instant death, so that the specimens may be trans- 
five immediately to sixty per cent, and afterwards to seventy- 
for a cent alcohol, allowing them to remain in each solution 
- saad hours. Keep in ninety per cent alcohol. From four to 
fi noA immersion in Martindale’s picrocarmine staining 
4 aay to stain specimens killed by either of the above 
= °S.— Four. of the Roy. Micros. Soc., Feb., 1884. 
: E ONTING FLurp For Atca.—For preserving the cell-contents 
alge, G natural color and form of desmids,.volvox and other 
| act well W. Morehouse finds a mounting fluid made as follows to 
a ture of k Dissolve fifteen grains of acetate of copper in a mix- 
- distilleg owt fluid ounces of camphor water, four fluid ounces of 
tight “apa and twenty minims of glacial acetic acid; add 
Of lant ce ences Of Price’s glycerine, and filter. When sections 
hai ead or other vegetable specimens are mounted in this 
© ° “protoplasm is preserved. If in any case it is thought desi- 
