VETERINARY SCIENCE AND PRACTICE. 189 



ing carbolic acid. Xative cattle were afterwards exposed to the dipped 

 cattle, but no evidence was later found of their being infected by ticks. 

 Temperature readings of the various animals, which were taken daily, 

 are presented in detail in tabular form. The autopsy of a cow used 

 in the experiment, but which died from an abscess in the base of the 

 udder, is described, and also the case of an outbreak at Hannibal, Mis- 

 souri, where some of the cattle were evidently prevented by dipping 

 from contracting the fever. 



Experiments were also made with serum to determine whether immu- 

 nity from the fever might not be established. A method of preparation 

 and injection of the serum is described and the conclusion fiually 

 drawn that while the evidence obtained from the experiments gives 

 grounds for believing that prevention may be secured in many cases, 

 the author does not feel quite justihed in making a positive statement 

 in favor of the serum. The temperature record of the injected cow is 

 given in tabular form. 



(3) Disinfection of postures. — Experiments were made with adult 

 ticks to learn what their movements might be when removed from the 

 animal, and all tend to confirm the idea that infection may be confined 

 within very narrow limits and that it will not be difficult to disinfect 

 large areas, if systematic efforts are made for that purpose. In the 

 experiments the ticks were placed on a flat surface covered by a heavy 

 paper 3 or 4 ft. iu size, blackened by soot upon which the tracks made 

 by the animal were readily preserved by passing the paper through a 

 solution of shellac. 



These experiments all tend to show that under ordinary conditions 

 the tick seldom gets more than a very few inches from the point where 

 it is dropped. The author goes on to state that pastures may be dis- 

 infected by burning the grass at the first opportunity after it is 

 killed by frost. The combustibility of the grass may be increased by 

 spraying a mixture of crude kerosene and 5 per cent of naphtha or 10 per 

 cent of gasoline over it. Further he speaks favorably of quarantining 

 infested grounds, pointing out the fact that if horses and cows are kept 

 off the iufested pasture the tick will finally die, since the presence of 

 these animals is necessary to its existence. 



(1) Experiments on the Australian cattle disease. — Ticks were received 

 from Australia via the Texas Experiment Station, but it is stated that 

 their condition upon arrival was such as not to be favorable to results 

 that would yield evidence either for or against the conclusion that the 

 Australian cattle disease and Texas fever are identical, but evidence 

 from other sources leads the author to think the 2 diseases the same. 



Parasitic gastro-enteritis in lambs, J. McFadyean (Jour. Hoy. 

 Agl. Soc. England, 3. ser., 8 (1897), I, Xo. 29, pp. 38-50).— The author 

 gives the result of the examination of some 40 lambs that had died of 

 this disease. In all cases some nematode worm was found in the intes- 

 tine, and iu a large portion of cases 2 or more species were found in 



