EXTRACTS FROM EXCHANGES. 
291 
by L. A. Merillat (referred to above), namely, the patient, 
so to speak, is choked off with a good dose of chloroform as 
quickly as possible, but without any air at all. While this 
may seem theoretically wrong, every-day practice supports it 
as correct and safe. More than one minute has never been 
consumed by the writer to deeply chloroform a horse. When 
a continuous narcosis is esseUtial afterwards chloroform is 
given in small quantities and mixed with air. On an aver¬ 
age io to 15 minutes are required for the animal to regain its 
feet after coming out of the chloroform; occasionally after a pro¬ 
longed session one half hour maybe necessary before the animal 
gets up without tumbling about. Animals fed soon after their 
return from the operating room usually show attempts at vom¬ 
iting and may expel a greenish, slimy mass or even suffer sub¬ 
sequently with a fatal deglutition pneumonia. The disadvan¬ 
tages of the chloral hydrate narcosis and the advantages ot 
chloroform according to the writer’s experience are as follows : 
Chloral Hydrate .— (1) The necessity of raking the rectum ; 
(2) The necessity that a person must keep the anus covered 
with the hand to prevent the escape of the emulsion for 25 
minutes to 1 hour; (3) The possibility of a proctitis and pro¬ 
lapsus recti unless very dilute and fresh preparations are used ; 
(4) The waste of time before narcosis sets in, 25 minutes to 1 
hour; (5) The waste of time before the animal can rise safely 
after the operation is finished, 45 minutes to 4 hours ; (6) Deep 
narcosis cannot be obtained with a dose safe to the animal. 
Chloroform. —(1) Narcosis is obtained in 20 to 45 seconds; 
(2) Complete anaesthesia is surely gotten ; (3) The patient al¬ 
most invariably regains its feet in from 10 to 20 minutes after 
the operation is finished ; (4) With ordinary care it is the safest 
and most complete general anaesthetic for the horse. 
EXTRACTS FROM EXCHANGES. 
GERMAN REVIEW. 
By Adolph Eichhorn, D.V.S., Bureau of Animal Industry, Milwaukee, Wis. 
A Rare Case of Bradycardia.— By bradycardia (hypo¬ 
dynamia, adynamia cardis) is understood a diminishing in the 
number of the heart beats, resulting from an irritation of the 
vagus or the vago accessorius. The irritation may take place in 
