treatment, developed by Lentz, has been highly recommended on the 
strength of clinical experience, but no critical tests have yet been 
published giving exact information in regard to its efficacy. No 
dosage for large dogs has yet been given, but it seems probable that 
the dose should be increased up to Yi grain for large dogs. 
A treatment developed by Dr. E. T. Davison is as follows: Fast 
overnight. At 10:00 A. M., for dogs of average size, give four 10- 
grain capsules (those holding 10 grains of quinine) filled with oleoresin 
of male fern, and follow with an ounce of water or milk, preferably 
milk. Forty-five minutes later give four 10-grain capsules full of 
freshly ground areca nut. It is essential that the areca nut be 
freshly ground; after grinding it gradually loses its potency and 
finally becomes inert. Follow the areca nut with an ounce of milk 
or water as above. Worms usually pass in a half hour to an hour. 
After dosing tie the dog’s head as high as it can be held without 
choking, to prevent vomiting. 
Oleoresin of male fern, 3.75 cc. (1 fluid dram) in capsules, fol¬ 
lowed immediately by 32 cc. (1 fluid ounce) of castor oil, is highly 
effective against tapeworms. The theory that castor oil increases 
the toxicity of male fern is not supported by experience and experi¬ 
ments; critical tests show that castor oil is protective to a consider¬ 
able extent against the toxic effects of male fern where the two drugs 
are given together. 
Kamala, 2 to 8 gms. (0.5 to 2 drams) in syrup, is very effective 
against tapeworms. 
Tapeworms of the genus Dipylidium, the double-pored tapeworms 
of carnivores, are difficult to remove entirely owing to the habit these 
worms have of sewing the head and the anterior portion of the strobila 
into the mucosa. Thus protected the worm may lose the posterior 
portion of the strobila from anthelmintic action, but the head will re- 
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