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conunenoenient of the operations, the small bare patches, however, 

 still roiimining. Agaiu, it has also been noticed that when camels 

 affected with this disease have been standing close to otliers, 

 the latter have not become aJEfected, It was, however, observed 

 that the large, coarse bred camels suffered far more than the 

 others. I do not consider the condition of skin thus described 

 to be due to the mange insect. No microscope could be obtained 

 to ascertain if the acarus existed, but as far as natural vision 

 assisted it could not be detected." Differential diagnosis must 

 depend on observations as to actual communication by contagion, 

 on the obstinacy in resistance to treatment, and on detection of 

 the mange parasite. The latter is the sole absolute distinctive, 

 and as the ectozoon is detectible by use of a hand lens or even by 

 means of the naked eye there is no reason for reservation of 

 diagnosis in ordinary cases. 



The natives of all camel countries have learned by experience 

 the necessity for adopting prophylactic measures against the 

 non-parasitic skin-disease. Vallon (Mem. de la Comm. de 

 hygiene hippique, Paris, 1856,) tells us the Arabs of North 

 Africa tar their dromedaries. The natives of India annually 

 adopt a course of preventive treatment (tel karna), which varies 

 somewhat in different localities as to time of year when adopted 

 and the substances used. The Punjabis and inhabitants of 

 Beloochistan in spring (March and April) rest their camels, 

 give them doses of nutritive oil (about 1 seer daily from 3 to 12 

 days), and apply Taramera oil or mustard oil to the skin. The 

 Egyptian camel corps was the only part of the Nile Force in 

 which eczema was not prevalent. This seemed due to the camels 

 having been clipped in September and smeared Avith ghi, sul- 

 phur, and salt, also each camel having a man in charge of him 

 and being properly and regularly groomed. Mr. Oliphant found 

 simple administration of Taramera oil internally, and its exter- 

 nal application caused the disease to yield readily, in marked 

 contrast to the true parasitic form, which is proverbially obsti- 

 nate. Liberal diet and general attention to hygiene of the patients 

 is a matter of some importance. Whether or no this form 

 of disorder is related to scurvy has been debated ; it probably 



