134 
difficulties in removing ccenurus cerebralis. 
whethei to intioduce the trochar more deeply or to operate at another 
point. When antiseptically treated from the first, the wound seldom 
gives much trouble, and no objection exists to renewing the attempt in 
allot lei place. Sometimes the sac lies so deep as to be impossible of 
removal, and little good can be done, even with the explorer first 
designed by Stung, and improved by Lehmann. The injuries insepar¬ 
able from the use of this instrument do not, however, occasion any 
particular danger. 
Earns with large well-developed horns give most trouble. In them 
the frontal sinuses are large, and cover so much of the skull that 
on y the posterior folds of the cerebrum can be directly reached from 
the exterior. Moller endeavours, in such cases, firstly, to trephine 
the fiontal sinuses, and thence to open the roof of the cranium with a 
trochar. It is difficult, however, to make the frontal sinus aseptic, and, 
1U T n& i Ing . lfc ° ut ’ Ia T 6 quantities of fllli d pass into the nostrils, producing 
1 y ty m breathing. Hence, during operation, the head should be 
penc u ous, lough this is attended with considerable discomfort to 
ie operator. The thin mucous membrane can hardly be kept aseptic, 
mi lorn l m ammatory processes are easily propagated to the cranial 
cavity. The easiest subjects are ewes, in which both skin and bone are 
alike thin. 
the l0SSe a-T heavy ' Generall y onl - v 10 per cent, are saved, 
and of these some die later of the sequel* of the disease. The operation 
is usua y con ned to rams and specially valuable animals. The 
percentage of cures claimed varies greatly. Englehart records 6 per 
cen ., i o n, o pei cent.; Scholz, 25 per cent.; Dammann, 33 percent • 
Eeboul who operates in primitive style with a cobbler’s awl and feathei 
qui 1, states that he has saved 50 per cent.; and Sutner, even 70 per 
cent. Euhlmann claims to have saved from one-half to one-fourth of 
found 01 T 1 ) ° n : eX , ClUS1V6 ° f th6 CaS6S in which ™ bladder could be 
be skdf , Tfn reSUltS d6pend P art) y on accident, and partly on 
the slalfulness of the operators. r J 
conditiof T'CinlhTmlZl & °“ formation of sku11 and 
relief' ^TheZe" T bladder^d “ns'obfe^ ^temporary 
dogs and thei? 
BoJr^iSSi” “: 1 fi th in G rTi f oc t s —-*.■ 
