824 
DOCHMIUS DUODEN ALTS AND ANGUILLULA3. 
slightly, the other more strongly. In this state of the pulse 
•there seems, from experimentation, to be a complete rever¬ 
sion as to the blood pressure in the circulation ; the arterial 
pressure is diminished, while the venous is increased, and 
the capillary movement, instead of being uniform, is 
oscillatory. 
The venous pulse (pulsus venerum) is the name given to 
that obvious throbbing of the large veins, particularly in the 
jugular; common enough in the ox, and then not necessarily 
indicative of disease; is, when marked in the horse, the usual 
accompaniment of certain grave cardiac lesion. 
ON THE ACTION OF CHEMICAL AGENTS AND 
MEDICINAL SUBSTANCES ON THE LARVAE 
OF DOCHMIUS D U ODEN A LIS, AND AN GUIL- 
LULAS ; INCLUDING THERAPEUTICAL CON¬ 
SIDERATIONS RELATIVE TO THE CURE OF 
PATIENTS FROM MONT ST. GOTHARD. 
By Professor Perroncito, M.D., Turin, 
(Communicated by Dr. Cobbold, F.R.S.) 
The larvae of the Anchilostoma possess greater resistance 
than those of the Anguillula of Bavay. The first are evi¬ 
dently stronger and resist far more the action of the sub¬ 
stances that have been experimented with, prophylactically 
and therapeutically. The chemical and pharmaceutical 
preparations which kill the larvae of the Anchilostoma, kill 
also those of the Anguillula. The concentrated solution of 
chloride of sodium kills them in a period of time agreeing 
with the percental degree of the saturating substance. 
The larvae of Anguillula in the second state die in a few 
minutes in the solutions at 8 to 9 per cent.; those of Anchi¬ 
lostoma, lately capsuled and immature, die also soon in the 
dilutions of 9 to 10 per cent.; if mature, not yet calcified in 
the solutions at 12 per cent., die in five or six minutes; the 
mature ones with calcified capsule I have seen resist till 
beyond 24*25 in solutions of fifteen and sixteen of chloride 
of sodium. In the dilution of bromide of potassium at 10 per 
cent, the larvae of live Anchilostoma were found alive after 
half an hour. 
