g2 EXPERIMENT STATION RECORD. [Vol.38 



tions of the International Commission on the Control of Bovine Tuberculosis, 

 as previusly noted (E. S. R., 25, p. 384). 



Fooling with tuberculosis, F. F. Field et al. {Kimball's Dairy Farmer, 15 

 {1911), No. 19, p. 7//6). — The successful eradication of tuberculosis from a large 

 herd of dairy cows in Massachusetts by the Ostertag method is reported upon. 

 In the 3.5 years that the system was under way there were but three reactors 

 in young animals reared in this way. 



Poisoning of cattle with horse-radish, W. Hackett {Jour. Compar. Path, 

 and Ther., SO {1917), No. 2, p. i38).— The author reports upon the loss of sev- 

 eral head of cattle from feeding upon a considerable quantity of horse-radish 

 roots. 



Poisoning of cattle with British ragwort, S. Stockman {Jour. Compar. 

 Path, and Ther., 30 {1917), No. 2, pp. 131-lSJt).—A report upon the loss of a 

 large number of cattle at Northallerton from feeding upon forage containing 

 ragwort (Senecio). 



Eradicating tall larkspur on cattle ranges in the National Forests, A. B. 

 AxDous {U. S. Dept. Agr., Farmers' Bui. 826 {1917), pp. 23, figs. 8).— This pub- 

 lication gives the results of grubbing work in the eradication of tall larkspur 

 on the National Forest ranges where the annual losses of cattle due to poison- 

 ing by this plant amount to about 5,000 head. The methods of operation, equip- 

 ment, etc., are described. " The average cost of eradicating larkspur by grubbing 

 probably falls between $3.65 and $4.15 per acre on range that is comparatively 

 free from rocks, willows, and brush. For willow and rocky areas about $10 an 

 acre probably represents the maximum cost." 



Investigations into the cause of worm nodules (Onchocerca gibsoni) in 

 cattle, C. G. Dickinson and G. F. Hill {Melbourne, Aust.: Govt., 1916, pp. 7). — 

 The work here reported has definitely excluded certain species that have been 

 considered as possible vectors, namely, Lyperosia exigua, Stomoxys calcitrans, 

 Tabanus mastersi, T. nigritarsis, {Boophilus) Margaropus australis, and any 

 purely aquatic forms other than those possibly found in the bore water. See 

 also a note by McEachran and Hill (E. S. R., 34, p. 581). 



External parasites of sheep: Eradication of ticks in New Zealand, A. Mat- 

 thews {Joiir. Agr. [New Zeal.], 15 {1917), No. 2, pp. 73-78). — A discussion of 

 methods in eradication work with the sheep tick or ked {Melophagus ovinus) 

 in New Zealand. Attention is called to the eradication of the sheep scab mite 

 that was effected many years ago under very great difliculties, since which time 

 there has been no return of the disease. 



Hog cholera: Prevention and treatment, M. Dorset and O. B. Hess {U. 8. 

 Dept. Agr., Farmers' Bui. 834 {1917), pp. 32, figs. 13). — A summary of infor- 

 mation on the subject based upon the more recent investigations and demonstra- 

 tions of control work carried on by the U. S. Department of Agriculture in co- 

 operation with the State authorities. " Experiments of the Bureau of Animal 

 Industry have demonstrated the possibility of greatly reducing the losses from 

 hog cholera wherever farmers are willing to cooperate and take steps to prevent 

 the spread of infection and secure the proper treatment of their herds." 



On the possibility of the infection of pigs with the flukes Opisthorchis 

 felinus, Pseudoamphistomum daniibiense, and Metorchis albidus, Joan 

 CruREA {Ztschr. Fleisch. u. Milchhyg., 26 {1916), pp. 323-326; abs. in Abs. Bact., 

 1 {1917), No. 4, p. 317). — Fish containing larvss of 0. felineus, M. albidus, and 

 P. danubiense were fed to young pigs. The liver, gall bladder, and bile ducts' 

 became infested with the first two of these but not with the third. 



Lepinay's treatment of mange of the horse by sulphurous anhydrid, 

 ViGEL and Chollet {Vet. Jour., 73 {1917), No. 506, pp. 267-276, figs. 6). — The 

 authors find that in the treatment of the horse for mange sulphur dioxld is 



