The albuminuria succeeding the collapse of Asiatic cholera or yellow fever seems to have a somewhat similar origin, being the result of re-establishment of the circulation after extreme anæmia of the kidney. Clinical facts in general seem to point to simple disturbance of the circulation and to alterations in the kidneys themselves as the usual causes of albuminuria, though in many cases the lesion seems to be a slight and temporary one. Some other conditions under which such disturbances and alterations may arise, exclusive of Bright's disease, are the following: Munn[15] found albumen in small quantities in 11 per cent. of cases presenting themselves for life insurance, supposing themselves healthy and having no lesions of heart or lungs. It is not stated whether casts were found in these cases or not, and their value as representing healthy {39} persons cannot, it is obvious, be correctly estimated until some time has elapsed. It is well known that renal lesions may be exceedingly slow in their progress, and it is by no means improbable that a part of these cases may have been really in the early stages of a chronic form of Bright's disease. Albumen has been found in the urine of boys and adolescents, as well as in that of healthy soldiers, tested immediately after rising: in most of these cases the amount was extremely small. Certain conditions, moreover, may greatly increase the proportion of cases in these same classes in which albumen is present. Thus, fatiguing exercise will bring it on in some persons, and the urine of a body of soldiers if examined late in the day after severe drill shows a much larger proportion of albuminurics than if examined after rising. The urine of the pedestrian Weston is said to have contained not only albumen, but casts. It is certainly not true that fatiguing exercise will cause albuminuria in everybody, and it is not claimed, even by those who report these and similar cases, that they prove albumen to be a normal constituent. Some of the cases are distinctly described as delicate without being actually ill. Cases have been reported where cold bathing has been followed by temporary albuminuria. Here it is in the highest degree probable that a disturbance in the circulation is produced by contraction of the cutaneous arterioles; and it is possible that we may find in this increased sensitiveness of certain persons an explanation of the occurrence of acute dropsy as a sequel to scarlatina or as the result of exposure in only a small proportion of the cases where the exposure takes place. It is hardly necessary to admit, on the basis of these observations, that albumen is a constituent of healthy urine, although this may be shown at some future day by still more delicate tests, but simply that the renal circulation may in certain sensitive persons be sufficiently influenced by slight and transient causes to permit albumen to pass into the urine. It is the almost unanimous conclusion