The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . O h w h cz o 2 o THE TANGANYIKA PROBLEM. 23 water of Lake Shirwa contains, but, following the same lineof investigation, I distributed while on Tanganyika fivehundred young prawns, in equal quantities of water, amongtwelve vessels. Leaving two unaltered as a control to therest, salt was added so that the solution in the remainingten was increased daily in the proportion given in the tableon p. 24 in which the course of the experiments canbe seen ; and from which it wil
The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . O h w h cz o 2 o THE TANGANYIKA PROBLEM. 23 water of Lake Shirwa contains, but, following the same lineof investigation, I distributed while on Tanganyika fivehundred young prawns, in equal quantities of water, amongtwelve vessels. Leaving two unaltered as a control to therest, salt was added so that the solution in the remainingten was increased daily in the proportion given in the tableon p. 24 in which the course of the experiments canbe seen ; and from which it will be obvious that in allcases the prawns died when the quantity of salt insolution in the vessel reached 8 per cent., no matterwhat the rate at which the increase had been made ;and some time before this point, although the prawnswere plentifully supplied with food, their developmentwas seriously interfered with, the salt producing aprogressively stunting action proportionate to its effect of introducing salt into the environment of fresh-water organisms such as prawns leads thus to exactly thesame result as
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