287 
SECOND NOTE ON THE PHYSIOLOGICAL TEST FOR 
STRYCHNIA. 
By Marshall Hall, M.D., F.R.S., &c. 
Sir, — I have been enabled to detect the ^th part of a 
grain of the acetate of strychnia. 
The young frog fresh from the pools is the most susceptible 
to the influence of this extraordinary agent. 
All young animals are more susceptible than the adult of 
the same species. 
The frog is most susceptible of all. It is not less strychno- 
scopic than galvanoscopic. 
In proceeding with an inquiry we should begin with the 
frog, because it is the most detective. We may proceed to 
use other animals, but these can only detect a larger dose of 
the poison, and they are in nowise more satisfactory. The 
phenomena in them are less distinctive even than in the frog. 
In one case I gave |th of a grain of the acetate of strychnia 
to a cat. It proved fatal. Some time having elapsed, Mr. 
Lloyd Bullock prepared the contents of the stomach, and 
we induced strychnism in three frogs in succession. The 
dose of poison would scarcely have affected another cat or a 
rabbit. 
A kitten was killed by ^th part of a grain, and an adult 
cat by g? ¥ th of a grain of the acetate of strychnia. This 
would, I should think, not have been detectible by another 
kitten or cat, as taken from the stomach. But many times 
less would be detectible and demonstrable by means of the 
strychnocopic frog. — Lancet , March 29, 1856. 
EPIZOOTIC AMONG ARTILLERY HORSES AT GAL AT A- SERAI. 
A very suspicious epidemic has broken out among the 
Artillery horses belonging to battery stationed in Galata- 
serai. On Wednesday last the horses were as usual taken to 
be watered at the troughs erected within the enclosure of the 
building. Soon after they returned, the horses, which had 
been quite well before and in excellent condition, began to 
show symptoms of uneasiness ; they refused to eat and became 
restless. This restlessness soon turned into a spasmodic 
nervousness ; the horses began to tremble in all their limbs, 
