olive oil for animals weighing 700 to 800 pounds, and in doses of half 
this amount of carbon tetrachlorid and olive oil for yearlings. At 
present we have too little evidence and experience on which to make 
recommendations. 
Hookworms: The solution of copper sulphate and tobacco dis¬ 
cussed in connection with stomach worms in sheep has been reported 
as effective against hookworms in sheep and might be effective 
against hookworms in cattle, especially in repeated doses. Carbon 
tetrachlorid, in the tests on calves referred to above, removed almost 
half of the hookworms from one calf and 99 per cent of those present 
in the other, each calf having hundreds of worms. As noted, the doses 
given were apparently too large and this subject requires more investi¬ 
gation. Marek has reported satisfactory results from the use of a 
proprietary composed of lipoid-soluble constituents of male fern. 
Nodular worms: Csontos and Pataki report good clinical results 
from the use of the proprietary remedy referred to above as used by 
Marek against hookworms. Carbon tetrachlorid, in the tests of calves 
referred to above removed all the nodular worms from both animals. 
It is not yet known what dose will maintain this efficacy and at the 
same time be safe for cattle; the dose given above was too large for 
safety. 
Small trichostrongyles: Nothing is yet known in regard to the 
removal of these worms from cattle, but carbon tetrachlorid has been 
found more effective against similar worms in sheep than any other 
drug yet tested and might prove effective here in suitable doses. 
Tapeworms: The solution of copper sulphate and tobacco dis¬ 
cussed under the heading of stomach worms of sheep is said to be 
very effective against tapeworms in sheep. In doses suitable for cattle, 
perhaps 100 to 300 cc., this treatment might also be effective against 
tapeworms in cattle. 
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