426 Journal of Agricultural Research voi. xii, No. 7 



feces. On account of their minute size they dry quickly, and unless the 

 feces are examined very soon after they are passed, many specimens will 

 be unrecognized. The remedy, therefore, may have been more effective 

 for tapeworms than the figures indicate. Its principal advantage, how- 

 ever, seems to be as a remedy for roundworms (Ascaridia perspicillum). 



For worms in dogs. — Four dogs weighing 2.5 to y.j kilos were given 

 preliminary purgation with castor oil, and dosed with turpentine at the 

 rate of i mil per kilo of weight. The turpentine was given mixed with 

 castor oil, 15 to 30 mils, according to the weight of the animals. 



The preliminary purgation with castor oil did not bring away any 

 worms. One of the dogs died on the fifth day after treatment. 



Only one worm, an ascarid, was passed; to this should be added one 

 ascarid found in the rectum of the dog that died, making two ascarids 

 removed by the turpentine. 



In view of the lack of results from the treatment, the dogs in this 

 experiment were not killed. Just previous to the experiment, micro- 

 scopic examination of the feces for eggs had shown that all of the dogs 

 were infested with either hookworms or ascarids or both. On the last 

 day of the experiment the feces were again examined for eggs, and eggs 

 of the same worms were found to be still present. 



All the dogs showed symptoms of distress immediately after the 

 treatment with turpentine, the principal feature being a temporary 

 paralysis of the hind quarters. 



It may be concluded that turpentine in doses of i mil per kilo of 

 weight is not very efficacious against ascarids in dogs, is entirely ineffi- 

 cacious against hookworms, gives rise to pronounced suffering and tem- 

 porary paralysis of the hindquarters, and may kill the dog. 



For worms in hogs. — Turpentine is frequently prescribed as a 

 remedy for roundworms {Ascaris suum) in swine. It is often given in 

 repeated doses mixed with the feed. A better way is to make an emul- 

 sion of the turpentine with equal parts of flaxseed decoction. This is 

 more easily miscible with the feed, and avoids the burning caused by 

 the ingestion of pure turpentine. 



An emulsion of turpentine and flaxseed decoction, made by boiling 

 85 gm. of flaxseed in 296 mils (10 ounces) of water, straining, and adding 

 an equal amount of turpentine, was fed to three hogs by the junior writer. 

 The hogs weighed from 45.36 to 68.04 kgm. The equivalent of 7.4 mils 

 of turpentine per hog or 44.36 mils of the mixture, was mixed daily in 

 the feed of the three hogs for seven days. At the end of seven days all 

 the hogs were listless, refused to eat, and were constantly voiding small 

 amounts of urine, the nephritic symptoms continuing for a week after 

 the treatment stopped. All the feces of the hogs contained ascarid 

 (Ascaris suum) eggs after the experiment was concluded. 



