ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
473 
On the Visibility and Optical Aspects of Hairs viewed from a 
distance. (Journ. R. Micr. Soc., 1878, pp. 318-20.) 
The President’s Address. [Progress of Microscopy.] ( Journ. 
R. Micr. Soc., 1879, pp. 113-21.) 
On Fungoid Growths in Aqueous Solutions of Silica, and their 
Artificial Fossilisation. By W. C. Roberts and H. J. Slack. (Trans. 
R. Micr. Soc., N.S. xvi. 1868, pp. 105-8.) 
Diatomaceous Earth from the Lake of Valencia, Caracas. By 
A. Ernst and H. J. Slack. (Monthly Micr. Journ., vi. 1871, pp. 69-70.) 
An appreciative notice of our deceased Fellow appeared in the 
Daily News for June 27th. 
£. Technique.* 
Methods of Examining and Staining Living and Read Cells and 
Tissues.! — Herr G. Marpmann has made a copious compilation of the 
various methods in use for examining cells and tissues. There is nothing 
new in the author’s paper, some of the formulae given being more than 
a quarter of a century old, and all may be found in works devoted to 
this branch of science. Nevertheless, it is a useful paper. 
Cl) Collecting- Objects, including Culture Processes. 
Cultures of Pneumococcus on Blood.J — MM. Gilbert and Fournier 
have found that Pneumococcus thrives well on defibrinated horse-blood, 
and that the growth appearances are quite characteristic. After 18 to 20 
hours the inoculation streak is surrounded by a brown colour, which 
changes to green or to brownish-yellow. The virulence and vegetative 
power are well maintained. 
Cultivation of Amoebae on Solid Media.§ — Dr. C. Gorini has cul- 
tivated Amoeba s on potato with considerable success. The samples were 
obtained from Beyerinck’s |] mixed cultivation of Amoeba zymophila and 
SaccJiaromyces apiculatus. Transferences were made to potatoes of dif- 
ferent kinds, of different ages, and of different reaction. All did well. 
Blood-Serum- Agar Medium for Diphtheria. Herr Tochtermann 
recommends a medium composed of 2 per cent, agar mixed with 0 • 3-0 * 5 
per cent, grape sugar, 1 per cent, pepton, and 0*5 per cent. salt. To 
this is added sheep’s serum boiled for half an hour, in the proportion of 
2 or 3 to 2. The mixture is then sterilised in the usual way. The 
advantage of this medium is that the blood-serum need not be sterile, or 
be taken with aseptic precautions. 
Bacteriological Examination of old Cholera Dejecta.** — Dr. Zia 
* This subdivision contains (1) Collecting Objects, including Culture Pro- 
cesses ; (2) Preparing Objects ; (3) Cutting, including Imbedding and Microtomes ; 
(4) Staining and Injecting ; (5) Mounting, including slides, preservative fluids, &c. ; 
(6) Miscellaneous. 
f Zeitscbr. f. angewandte Mikr., i. (1896) pp. 321-30, 353-67. 
j La Medecine Moderne, 1896, p. 38, See Centralbl. f. Bakteriol. u. Parasitenk., 
1* Abt., xix. (1896) p. 836. 
§ Centralbl. f. Bakteriol. u. Parasitenk., l te Abt., xix. (1896) p. 785. 
|| See this Journal, ante , p. 198. 
Centralbl. f. Klin. Med., 1895, No. 40. See Centralbl. f. Bakteriol. u. Parasi- 
tenk., l te Abt., xix. (1896) p. 733. ** Ann. Inst. Pasteur, x. (1896) pp. 334-6. 
