41 8 Journal of Agricultural Research voi.xii, no. 7 



Following the administration of the preliminary purgative, two dogs 

 each passed two Taenia proglottides. Following the dose of pelletierine 

 tannate and castor oil, one dog passed five Taenia proglottides, and an- 

 other dog passed two proglottides. No tapeworm heads or nematodes 

 were found in the feces. The post-mortem examination revealed a few 

 nematodes and Dipylidium caninum, but no Taenia sp. 



It is evident that all three dogs were infested with species of Taenia, 

 since proglottides were recovered in the feces of all animals. The fact 

 that all dogs were free from Taenia on post-mortem examination is indi- 

 cative of the efficacy of the drug as a taeniacide. The failure to recover 

 the worms in the feces probably resulted from neglect on the part of the 

 attendant collecting the feces. 



Pelletierine tannate apparently proved entirely inefficacious against 

 Dipylidium caninum or intestinal nematodes in dogs, since none of 

 these parasites was found in the feces, but some were present post- 

 mortem. As there is a strong probability that all feces were not col- 

 lected, the writers can not be certain with regard to the total inefficacy 

 of the drug for these parasites. 



The sample of pelletierine tannate used in this experiment was pur- 

 chased from the same manufacturer and at the same time as the sample 

 used in the previous experiment on cats. It may therefore be assumed 

 to have the same potency as the sample used in the previous experi- 

 ment, which was tested for purity by the Biochemic Division. 



ARECA NUT 



For worms in dogs. — Areca nut (Areca catechu) is not infrequently 

 prescribed as an anthelmintic for ascarids in dogs. Railliet {1915) gives 

 the dose of areca nut as 2 to 4 gm. combined with 10 to 20 gm. of soluble 

 cream of tartar,^ the latter presumably being used merely as a vehicle. 

 In this experiment 6 gm. of areca nut and 36 gm. of soluble cream of tartar 

 were formed into 12 pills, 4 of which were given to each of three puppies 

 weighing between 1.8 and 2.3 kgm. Previous to the experiment the dogs 

 were each given 1 4.79 mils of castor oil, which failed to remove any worms, 

 and were then starved for 24 hours. All the dogs were infested with 

 ascarids (Belascaris marginata) and hookworms {Ancylo stoma caninum), 

 as shown by previous fecal examinations. The day following the ad- 

 ministration of the vermifuge one of the dogs passed 4 B. marginata 

 and was found dead the following morning. The other dogs passed no 

 worms. The post-mortem of the dog that died showed hemorrhagic 

 areas in the colon and feces stained with blood. The other organs were 



• Soluble cream of tartar, a preparation seldom used by American veterinarians, is boro-tartrate of potas- 

 sium, made by boiling together four parts of cream of tartar with one part of boric acid in a large amoimt of 

 water. When most of the water has evaporated, the process of evaporation is completed in a drying oven 

 and the resultant salt is pulverized and stored in well-stoppered bottles. Soluble cream of tartar is very- 

 deliquescent, and hence well adapted for making a piUmass. 



