434 Journal of Agricultural Research voi. xri. No. 7 



modern literature in regard to the use of oil of chenopodium, and, so far 

 as the writer is aware, no use had been made of the oil as an anthelmintic 

 for swine. Hence, the drug was administered cautiously. Subsequent 

 experiments have shown that doses of chenopodium relatively many 

 times larger are perfectly well tolerated by swine and are more certain 

 in action. 



In a second experiment with swine chenopodium was administered 

 in castor oil, and was not given mixed with feed but was fed with a spoon 

 to each hog individually. Four of the five hogs used were each given 

 28.35 gn^- of Epsom salt mixed with their feed, while the fifth hog was 

 given none. All animals were then starved for 24 hours before the 

 administration of the chenopodium. The smallest pig, weighing 12.25 

 kgm. was given 0.8 mil; the others, weighing 12.7 to 28.12 kgm. were 

 given I mil. The dose of chenopodium in each case was given with 

 29.57 niils of castor oil. This treatment was entirely successful. All 

 five hogs had shown numbers of ascarid eggs in their feces prior to the 

 treatment, and all were found free from ascarid eggs a week later. The 

 feces of the hogs were again examined three days later and found negative. 

 Two of the five hogs received a third fecal examination, which was 

 consistently negative. 



It appears from the above that chenopodium is an excellent anthel- 

 mintic when given in individual doses after preliminary starvation, and 

 in most cases may be relied on to remove all the ascarid worms present. 

 This opinion was confirmed by further experiments. The preliminary 

 dosing with Epsom salt did not seem to be of any benefit, since the cheno- 

 podium was as successful in the case of the hog which received no salt 

 as in the case of those that did. Subsequent experience has shown that 

 in the chenopodium treatment for hogs preUminary purgation is an un- 

 necessary expense. 



As there is always a demand among stockmen for something that can 

 be mixed with the feed to rid their hogs of worms, an experiment was 

 undertaken to determine the possibilities of this form of medication. 

 As hogs, especially if large, are very difficult to handle and as much time 

 and eff'ort would be required to dose separately each animal of a large 

 herd, the advantage of mixing the medicine in the feed is obvious. Unfor- 

 tunately this method proved impracticable, as shown by the following 

 experiment. 



One mil of chenopodium, 29.57 mils of castor oil, and 237 mils of lin- 

 seed decoction made by boiUng 113 gm. of linseed in 296 mils of water, 

 were thoroughly shaken together into a homogeneous emulsion. This 

 amount was allowed for each of foyr hogs weighing 20.4 to 32.2 kgm. The 

 emulsion was distributed evenly through a bran mash which all four 

 hogs ate together. The animals had previously been fed a mash con- 

 taining Epsom salt at the rate of 28.35 gm. for each animal, then starved 

 for 24 hours before treatment. The fecal examination a few days after 



