119 



On adding the oil to the alcohol, a portion of the former is precipitated 

 in about a quarter of an hour ; the supernatant fluid is decanted and 

 poured over the linen, which is then wrung out and dried at ordinary 

 room temperature. The garments will be shghtly greasy and more 

 pliable ; they may be worn for several weeks and retain their lice-free 

 properties until washed. The body does not require any attention ; 

 the simple wearing of garments thus treated being sufficient to 

 free it completely within 3 days. 



Griffiths (J. A.). Demodectic mange of domestic animals in 

 Nyasaland.— J/. Comp. Path. Therap., London, xxviii, pt. i, 

 March 1915, pp. 61-64, 1 fig. 

 Demodex follicidorum was apparently unknown in Nyasaland until 

 about five years ago and was probably introduced with imported 

 cattle. Outbreaks are almost confined to the Shire Highlands, and 

 only once was the disease found at any distance from this district, 

 and then in a bull from the infected area. Cattle owned by Europeans 

 are the greatest sufferers, but it has been found in sheep, pigs, dogs 

 and cats. A nodular eruption of the skin, usually of the neck and 

 shoulders, is the first symptom, and this may persist for eighteen or 

 more months ; the native herdsmen attribute these nodules to the 

 bites of flies. Emaciation and debility set in, and the death-rate is 

 high, 80 per cent, in one herd. The use of Coopers' Improved Cattle 

 Dip, by spraying or dipping once a week, has been found to be a good 

 remedy, combined with the usual sanitary measures, disinfection of 

 premises, segregation, etc. Emaciation does not begin till the nodules 

 break and become purulent. Diagnosis with the microscope is rapid 

 and easy. The danger of spread of infection is so great that it is not 

 considered economical to treat all animals, but better to slaughter 

 them. 



Sheather (A. Leslie). An improved method for the detection of mange 



Acari.— J?. Coinp. Path. Therap., London, xxyiii, pt. i, 



March 1915, pp. 64-66. 



The material to be examined is boiled in a 20 per cent, solution of 



Antiformin, and the sediment collected by the use of a hand centrifuge, 



the sediment is then examined with a little water, when the acari can 



be readily detected. The material is then placed in a wide 



test-tube and about 10 cc. of caustic potash are poured in, the tube 



is then cautiously warmed, and finally brought to the boil. The 



boiling is continued until all the coarse particles are destroyed. By 



experiment, it has been found that boiling for ten minutes is not 



sufficient to damage the parasites, and in practice it is seldom or 



never necessary to continue boiling for that length of time. 



A small hand centrifuge is all that is required for the sedimentation, 

 because a few turns only of the handle (not more than eight or ten) 

 are sufficient to throw clown the parasites, if any are present. It is, 

 in fact, a disadvantage to carry the centrifuging so far, as this throws 

 down a quantity of the finely granular sediment which is better left 

 in suspension in the liquid. By this method, parasites have been 

 detected in scrapings soaked in caustic potash, which had been examined 

 and pronounced free. 



