In fact, the moist warmth of our English summers is infinitely more oppressive and less easily borne than the far higher temperatures, but tempered by comparative absence of moisture, which prevail in the Karroo. The rarity of sunstroke throughout South Africa is a clinical observation which establishes the truth of the statements just made. In the records of a military hospital in the Northern Karroo during the months from August to April, including therefore the hottest time of the year, out of 3000 medical cases not a single instance of sunstroke was noted. The experience gained in this hospital has an additional value from the circumstance that the gifted physician, the late Dr. Washbourn, was the observer, and some of the results he records may be more eloquent than many pages of description. Of the medical cases (nearly 3000), 546 were enteric, 379 dysentery, 296 muscular rheumatism, 258 malaria, 187 "continued fever," 152 diarrhoea, 93 jaundice, 70 tonsilitis, 71 influenza, and only 43 bronchitis and chest affections. Dr. Washbourn acutely remarks, "From this list it may be roughly concluded that the air in South Africa is good; the food bad." It will be noticed that intestinal diseases form more than a third of the total. The dysentery was probably due to faulty ingesta and not to the specific organism usually associated with dysentery, since amoebæ coli could not be found in the stools. Malaria occurs only in limited areas in the northern Transvaal and parts of Rhodesia; the Karroo proper and the coast-belt are entirely free. The causation of malaria is now so well understood that it must yearly become a more and more preventable disease. But the great outstanding features of the list, the prevalence of intestinal diseases, the absence of respiratory troubles, merit closer examination. The intestinal diseases, under which the muscular rheumatism, (caused by toxines), the jaundice, and much of the continued fever, must be included, are due to ingesta, _i.e._ food and water. The difficulty of obtaining good food, and the absence of sanitation which is the main cause of the impurity of the water, are the obstacles which must speedily be overcome in order to make the second feature assume its proper value in the treatment of disease. The rainfall is everywhere adequate for the supply of pure water, but this must be properly stored and kept from contagia. The interesting experiments which Dr. Vivian Poore has made on the subject of rural hygiene are convincing as to the possibility of disposing of excreta with complete security to health, and material profit to the community, without the necessity of abundant water. He has found that in the dry-earth system of closets, followed by the application of the excreta to the soil and their superficial burial in the humus, with subsequent tillage, a perfectly successful system of drainage is obtainable. In an acre and a half of ground he has for many