810 EXPEKIMENT STATION RECORD. 



sidered necessary to make this prohibition a permanent matter. Immunity, when 

 once acquired, appears to be lasting or permanent. During the author's investiga- 

 tions on this subject it was found that the period of incubation and the intensity of 

 tlie disease were the same whether the animals were exposed to tick infection or 

 inoculated with virulent blood. 



Texas fever and the role of buflfaloes and zebus in hot, unhealthy regions, 

 E. Mares {Jow: A/jr. Prat., n. xer., 4 {190-2), No. 29, pp. 75-80, figs. ^).— Since all 

 races of domestic cattle in Algeria, and especially the imported breeds, are more or 

 less susceptil)le to Texas fever, attempts have been made to obtain breeds by cross- 

 ing and otherwise which are resistant to this disease Incidentally during the work 

 along this line it was found that buffaloes of that country were naturally immune to 

 Texas fever. Brief notes are given on the economic value of these animals. It is 

 stated that they do not cross with domestic cattle, and that their habit of remaining 

 "near water during the warm months makes the provision of suitable pasturage rather 

 ■difficult. The zebu is equally resistant to Texas fever and crosses readily with 

 ■domestic cattle. All such cro.sses, even those which have but the slightest trace of 

 zebu blood, are immune to Texas fever. The crosses are described as fairly good 

 T^eef animals and animals of burden. 



Rinderpest in South Africa, D. Httcheox {Agr. Jour. Cape Good Hope, 21 {1902), 

 No. S, pp. 211-221). — In consequence of the continued occurrence of this disease in 

 South Africa the author has prepared a report containing information on all the 

 features of this disease which are especially interesting to stockmen. A history of 

 outbreaks of rinderiwst is given, the symptoms and course of the disease are 

 described, and notes are given on various unsuccessful attempts which have been 

 xnade to treat it medicinally. Special attention is given to the vaccination of suscep- 

 tible cattle by inoculation of bile taken from an affected animal. Detailed direc- 

 tions are given with regard to methods of obtaining this bile and of making the 

 operation. Other methods of vaccination are mentioned, such as the use of serum 

 and defiltrinated innnune Ijlood. 



Blackleg- and contagious abortion, D. F. Lixkey {Buh Missouri State Bd. Agr., 

 2 {1902), No. 5,2'>p. 13-23). — Brief notes are given on the symptoms and transmis- 

 sion of blackleg and on the metl>od of vaccinating animals to protect them against 

 this disease. In the discussion of contagious abortion attention ia chiefly called to 

 the nature of the disease and to the methods of disinfecting aborting animals and 

 premises on which the disease has occurred. 



Foot-and-mouth disease, D. E. Salmon {V. S. Dept. Agr., Bureau of Animal 

 IrKlvstrij Circ. 3S,.pp. 3). — Attention is called to a recent outbreak of foot-and-mouth 

 disease in certain localities in Massachusetts and adjacent States. Notes are given 

 on the nature and symptoms of the disease and on the importance of exterminating 

 dt. It is believed that the present outbreak can be completely controlled and eradi- 

 cated. Notes are al;-o given on the means by which the disease may be spread, and 

 on the practical measures which stock owners may adopt in protecting their animals. 



Heart water in calves, C. P. Lounsbury {Agr. Jour. Cape Good Hope, 21 {1902), 

 No. 3, p>p- 3^1, ^22). — The author has continued his experiments with regard to the 

 nature and relationship of this disease, and finds that apparently so-called calf dis- 

 «a.se and heart water are identical. At any rate, an attack of calf disease confers 

 resistance to heart water, and the converse of this statement is also true. The 

 experiments show also that the disease is carried by pathogenic ticks. 



The plague of ticks; their destruction by oil spraying, C. P. Lounsbury 

 {Agr. Joar. Cape Good Hope, 21 {1902), No. 4, pp- 337-345, pis. 4)- — The injury to 

 live stock from infestation with the common blue tfck, bont tick, and dog tick is at 

 times exceedingly serious and under ordinary circumstances is an important factor 

 in success in stock raising. Stock raisers of Cape Colony first attempted dipping ex- 

 periments, but without satisfactory results. A number of spraying experiments were 

 then tried with different materials, until finally kerosene oil proved to be the most 



