VETERINARY MEDICINE. 383 



traveuoiis medication. Following are some of the conclusions arrived at by the 

 author : 



" Ticli infestation in the northern counties of Arkansas is due partly to yearly 

 importation from farther south (and west in the case of Washington and Ben- 

 ton counties) and partly to overwintering. I^arval forms (seed ticks) survived 

 without host from October to April and probably later, but did not survive till 

 June. 



"Peri)etuation of tick infestation in north Arkansas is largely due to the 

 periods of unseasonable weather common in this region — periods of summer 

 weather during winter season. For the purpose of tick eradication quarantine 

 of ticky cattle should therefore be enforced in winter also. 



" Adult female cattle ticks do not survive over winter in this region but may 

 deposit eggs even in midwinter during warm spells of weather and thus per- 

 petuate the species. 



"Larval forms and ova of the cattle tick both failed to produce infection 

 when injected subcutaneously into susceptible cattle. The blood of the adult 

 female tick was found to be uncertain in its action but probably infectious only 

 during the first few days after reaching maturity. 



"Quinin has no specific action in this disease. Intravenous injection of 

 Lugol's iodin solution was effective in destroying the infective property in the 

 blood in one case but merely delayed its action in another. The maximum dose 

 for yearlings is about 30 cc." 



Tick eradication in Arkansas in 1907, W. Lenton (Arkansas Sta. Bui. 101, 

 pp. 211-220). — ^Attention is called to the great loss due to the cattle tick and the 

 benefits to be derived from its eradication. An act passed in May, 1907, made it 

 possible to cooperate actively with the Bureau of Animal Industry of this De- 

 partment and the work of eradication was commenced toward the end of May. 

 The author describes in detail the methods used. 



As a result of this work, on April 1, 1908, six counties were released from 

 quarantine and admitted to the free area. State funds having become ex- 

 hausted, the amount necessary to guarantee protection to the quarantine line 

 was raised by popular subscription. At present the expense of maintaining a 

 quarantine line in the State falls on the people of the six counties (Benton, 

 Carrol, Clay, Randolph, Lawrence, and Green) below which the line runs. It 

 is expected, however, that the next legislature will appropriate funds to protect 

 the quarantine line and also for tick eradication in other counties. 



The cattle tick, L. L. Lewis (Oklahoma Sta. Circ. Inform. 11, folio). — At- 

 tention is called to the importance of eradicating the cattle tick in Oklahoma, 

 and an account is given of the methods by which this may be accomplished. 



Cattle dipping, W. M. Power (Natal Agr. Jour., 11 (1908), No. 3, pp. 322- 

 32'/). — Dipping is believed to be a very valuable means of ridding cattle of ticks, 

 but, in the author's opinion, if adopted, it is necessary to have tick-free pastures 

 on which to turn the cattle, otherwise they become reinfested and the work 

 counts for little. The author ai-gues against compulsory dipping laws in locali- 

 ties in which there are many natives who do not believe in the effectiveness of 

 dipping. 



A specific lung disease of calves, L. E. W. Bevan (Jour. Compar. Path, and 

 Thrr., 21 (lOOS), No. 1, pp. 35--'i3). — During the past 8 years a number of out- 

 breaks of a lung disease have appeared in Rhodesia with a mortality of 50 per 

 cent or greater. The most characteristic symptom of the disease is a short 

 cough, the other symptoms being scarcely characteristic. Affected animals do 

 not lose their appetite. The principal post-mortem lesions are found in the 

 lungs which are studded with small nodules appearing upon the surface or in 



