78 EXPERIMENT STATION EECOED. [Vol. 35 



The use of the serum has given promising results, both in the recovery of dis- 

 eased animals and in checking the spread of the disease among healthy animals. 

 Sheep scab, M. Imes (U. 8. Dept. Agr., Farmers' Bid. 713 {1016), pp. 36, 

 figs. 21).— This publication, which supersedes Farmers' Bulletin 159 previously 

 noted (E. S. R., 15, p. 191), furnishes information for sheep raisers and live- 

 stock sanitary officers regarding the prevention, cure, and eradication of sheep 

 scab. 



A list of nematode parasites observed in the alimentary canal of sheep in 

 England, C. L. Boulenger {Parasitology, 7 {191J,), Xo. 3, pp. 2-'iO-2-'tO, pi. 1, 

 figs. Jt). — The author has found 13 species, distributed among 10 genera, to 

 occur in England, or nearly half of the known species. 



A note on the presence of Ostertagia trifurcata in the abomasum of a 

 sheep in England, S. Cave {Parasitology, 7 {1914), A'O. 3, pp. 201-203, figs. 3).— 

 In addition to numerous male and female specimens of 0. circumcincta {Strongy- 

 lus cervicornis) , a strongyle identical with 0. trifurcata was found in the fourth 

 stomach of a ewe at the Cambridge University farm. It is stated that previous 

 to this discovery the occurrence of this nematode had only been recorded from 

 the United States. 



[Hog-cholera studies] {North Dalcota Sta. Rpt. 1915, pt. 1, pp. 5-8). — In the 

 course of a general study of hog-cholera serum the influence of the time of 

 bleeding upon the protective value of the serum was incidentally observed. Two 

 weeks after immunization the hog was bled from the tail, and thereafter at 

 intervals of one week until four bleedings were obtained. The detailed results 

 of the work are presented in tabular form, but indicate in general a slight de- 

 crease in the potency of the serum. 



Hog cholera and its prevention by the use of antihog-cholera serum, 

 B. B. Flowe {Bui. N. C. Dept. Agr., 37 {1916), No. 3, pp. 32, figs. 19).— This 

 bulletin considers the subject of hog cholera in general under the titles of cause, 

 symptoms, sanitation, means by which the disease is spread, susceptibility, mor- 

 tality, and antihog-cholera serum and its use in the treatment of the disease. 



Stamping out hog cholera, J. W. Connaway {Columbia, Mo.: The Missouri 

 Farmer [1916], pp. 80, figs. 29).— In addition to a general discussion of the 

 manner of dealing with hog cholera by the author, several supplementary ac- 

 counts are included, namely, Profitable Fork Production, by F. G. King (pp. 

 45-GO) and Jlodern Systems of Swine Management, by L. A. Weaver (pp. 67-80). 

 Final report of the departmental committee appointed by the Board of 

 Agriculture and Fisheries to inquire into swine fever, with minutes of evi- 

 dence and appendix {Bd. Agr. and Fisheries [London], Final Rpt. Dept. Com. 

 Stcine Fever, pt. 4 {1915), pp. XTI+63; ahs. in Jour. Compar. Path, and Ther., 

 28 {1915), No. 3, pp. 251-271).— This report includes the minutes of evidence and 

 appendixes with experimental and statistical data. The committee submits the 

 following conclusions : 



" The manure of r-igs suffering from swine fever is infective. A period of 

 14 days may be regarded as sufficient to bring about the disinfection of in- 

 fective manure through natural causes. Rats are not, as has been suggested, 

 pathological carriers of swine fever. All the available evidence suggests that 

 swine fever Is not disseminated by external parasites. 



" While persons, vehicles, and animals which have been in contact with the 

 Infected pigs or premises may carry infective material mechanically within 

 the area of their movements, subject to the time limit indicated above, the 

 evidence leads the committee to the conclusion that all wide dissemination of 

 disease Is due to the movement of infective pigs. A pig may become infective 

 in three .lays after it has itself contracted infection and before it has actually 

 exhibited clinical symptoms of the disease, and a pig which has contracted the 



