To such a category must be added the curious superstitions indulged in by the native population of Tunis regarding methods of preventing hydrophobia in persons bitten by rabid animals. Dr. Loir refers to these primitive ideas on the art of healing in a report of the work carried out at the Anti-rabic Institute at Tunis, one of the many centres for the prevention of rabies by Pasteur's method which have been established in every quarter of the globe except Great Britain, the inhabitants of this "great conservative island-Empire," as a renowned foreign scientist describes it, still preferring a trip to Paris to countenancing the establishment of an anti-rabic institute in their own country. The Arab physicians in Tunis have from time immemorial sought to specially identify themselves with cures for this disease, which is so prevalent as to be a veritable scourge to the country. A much-vaunted remedy advocated by the profession consists in pounding up the charred head of a rabid dog with vinegar, and administering an emulsion of the same to the patient. The dung of camels is also highly prized as a remedy, as also the water of certain wells which the simple faith of the natives has endowed with supernatural curative properties. But the strangest prescription of all consists in broth made from lambs a year old, to which is added a peculiar kind of beetle, but in such a small quantity that the latter ingredient only equals the weight of a grain of corn. This concoction is given to the unfortunate patient twenty-three days after he has been bitten. In the urine, according to the Arabian doctors, seven small worms should be found which represent the embryos of dogs engendered by the virus in the human body, and which when once got rid of the patient recovers! In the face of such crude traditions upheld with so much tenacity by the native population, it is surprising that the Tunisian Anti-rabic Institute has met with such a large measure of support in the shape of applicants for admission, which, on an average, number over one hundred annually. The mortality amongst those treated closely approaches the satisfactory results obtained at the Paris Institute, where the death-rate amounts to about 0·38 per cent. of the persons treated. There is perhaps no more interesting chapter in the history and literature of medicine than might be compiled by searching out the early uses of drugs and the primitive application of methods in the art of healing, and tracing their connection, if possible, with the practices which are in vogue at the present day. In the matter of toxins and anti-toxins, or in respect to the modern theories of preventive medicine, there would appear to be a curious link between the methods based upon elaborate scientific inquiries and those which arose through simple experience and expediency.