222, PROCEEDINGS OF SOCIETIES. 
them they found immense differences out of all proportion to those of 
the diatoms, but all unquestionably belonging to the same species, 
and amongst which it would be impossible to draw any lines if they 
tried to make them into distinct species. 
The President said the subject was one which certainly was not 
confined merely to diatoms, but which equally belonged to every 
department of science, only that it happened in the case of diatoms 
that they had the opportunity of examining so great a number of 
individuals that the variety would be in a measure proportionately 
great. 
Donations to the Library and Cabinet since February 7, 1877: 
From 
Nature. “Weekly 2.) 5 se Gee ee sib ny ae oie ret 
Atheneum. Weekly .. SE tale he Voom oc Ditto, 
Society of Arts Journal. Weekly POI osc) pp) SECU 
Quarterly Journal of the Gealbaical Society val | (lea a emperor nO 
Bulletin de la Société Botanique de France... Teloysh hou MRED CRE 
Enumeracion de los Vertebra dos Fosiles de Espatia. “Par Don 
C. Calderon, 1877 .. toe ane Cnn .. Author, 
Journal of the Quekett Club. No. 33 : .. «= Chub. 
Micro-photographs from the Diatomaceze. ‘By x Redmayne .. Author. 
Some Remarkable Forms of Animal Life from the Great Deeps off 
the Norwegian Coast. Part 2. By George O.Sars .. .. Ditto. 
On the Practical Application of Autography in Zoology, and ona 
New Autographic Method. By G.O.Sars_.. Ditto. 
Eleven Stained Preparations, &c., peer abe: Dr. Christopher 
Johnstone, of Baltimore ae we — Ditto, 
Twelve Slides ‘of whole Insects .... va aes cele) ER EEEDC ee REESC « 
G. H. Jones, Esq., was elected a ‘Fellows of the Society. 
Watrer W. ReEevss, 
Assist.-Secretary. 
Meprioat Mioroscorioan Soolety. 
February 16, 1877.—Henry Power, Esq., President, in the chair. 
Hyperemia of the Brain from Hanging.—Dr. Browning exhibited 
some interesting specimens illustrative of this subject. Two were 
taken from executed criminals, and were prepared by Surgeon-Major 
Roth, of Berlin, and one was from one of the lower animals that had 
been hanged for experiment. The brains were, in all cases, injected 
with carmine. In his remarks upon these specimens Dr. Browning 
stated that whereas most medico-legal writers describe only a medium 
amount of vascularity in the brain and that of venous character, and 
extravasations as very rare, he had found the congestion most intense : 
the capillaries being so distended in some parts that scarcely any 
nerve substance was to be seen: however, he had not found any extra- 
vasations of blood. As cause for the vascularity, the speaker suggested 
that the knowledge of his fate might, in the case of the criminal, 
cause some hypercemia at last, though this could not hold with the 
lower animals. 
The cerebellum he had found more vascular than the cerebrum. 
The President suggested that the vascularity was owing to pressure 
