838 
EXTRACTS FROM EXCHANGES. 
these pills are administered. Smaller dogs receive 10-15, while 
large dogs all the 25 pills in one dose. One hour after the 
administration the action begins, without causing the dog to 
vomit. Two to three hours after , the dog expels the tapezvorm 
with head and segments. The author thinks the combination 
of the katnala with the semen areese brings about the remarka¬ 
ble effect, and to his knowledge this never was tried before. 
(One can have a smaller number of pills made from the same 
prescription, for more convenience in administration.)—(. Bert . 
Thierarzt. Wochenschr .) 
The Hsematomes of Horses and their Treatment 
\Hennig , Berlin\. —Hsematomes in horses are by no means 
rare occurrences, notwithstanding the opinions of veterinary 
surgeons regarding their nature differ, as they are taken by 
some as hgematomes, while by others as lymph extravasations. 
To enlighten this difference in opinions Hennig undertook very 
extensive experiments, of which the results can be concluded in 
the following : All the 75 examined blood cysts represented as a 
fact hsematomes. The experiments further demonstrated, and 
principally the hsematomes produced in an experimental way 
that their contents after long standing undergo such changes 
in its physical and chemical consistency that by this they are 
mistaken for lymph extravasates. Smaller hsematomes termi¬ 
nate in resorbtion ; middle sized may also be resorbed, but in 
this the resorbtion remains incomplete. Large hsematomes are 
not resorbed ; on the contrary, at their periphery there will a 
condensation of the connective tissue take place, by which the 
contents completely become incapsulated. Should the hsema¬ 
tomes become infected with pus cocci, they may suppurate and 
form abscesses. A putrefactive decomposition of their contents 
is very rare, and then the cavity contains a foetid, dirty fluid. 
Further terminations are their organization to connective tis¬ 
sue, calcifications aud ossifications. Their causes are : contu¬ 
sions resulting from beating, blows, falls, kicks or slips. In the 
last two cases they occur, very likely, from the violent contrac¬ 
tion of the muscles and rupture of some deeper blood vessels, 
giving rise to the formation of the hsematome. The prognosis 
is always favorable. In their treatment, first of all their open¬ 
ing is to be considered, which should not take place too soon, 
the proper time being from the fifth to the eighth day after their 
formation. As the blood tumors represent aseptic cysts, there¬ 
fore irrigations should be avoided, by which they may become 
infected. All that is essential is to take care of the incised 
