28 
fresh water, for some days requiring apparently no food ; but after 
a week the nourishment in their bag being csliaustcd, they began 
to seek their food in water and rapidly increased in size. As I have 
said before, Mr. Jacobi assures us that the experiment succeeded 
as well with mature fish that had been killed for the purpose of 
procuring the roe and the uiOt, these liaving been mixed together 
in cold water immediately after they were talcen out of the body, 
I have had this experiment tried twice,” continues Sir Humphrey, 
speaking in his own person, “ and with perfect success, and it 
offers a very good mode of increasing to any extent the quantity 
of trout in riv'ers or lakes, for the young ones are preserved from 
tlie attacks of fishes and other voracious animals or insects, at the 
time when they are most easily destroyed and perfectly helpless. 
The same plan, [ have no doubt, would uuswer equally well with 
grayling and other varities of the salmo genus. But in all experi¬ 
ments of this kind, the great principle is to have a constant 
current of fresh and aerated water ruiiniug over the eggs.” 
AVhat has been said of Canada by Mr. P. Porrester, in his 
“ Pish and Pishing” (Bentley, 1849,) will equally apply to many 
parts of this country. 
There are thousands and tens of tliousands of little tumbling 
transparent rills throughout this country—scarcely a farm without 
a dozen such—which have numerous natural basins in their 
courses, each of which, with the aid of a few hours’ work employed 
in raising a timber dam, and applying a grate at the entrance and 
egress of the stream, would constitute as perfect a storepond for 
tlie making of such experiments as could be erected by the wealth 
of Croesus; with the advantage, too, of having tiie fish requisite 
for the tests existing, in a state of nature, within a few miles^ 
perhaps within a few hundred yards, of the scene of action.'^^ As 
an examjde of what has been done by the simplest possible 
apparatus, I would instance the introduction of tlie grayling into 
the Clyde by the Angling Club of Glasgow. In i.he P7e^^/of last 
Saturday, Nov. 24, is a description and also a plan of the process. 
Within t he last few weeks, I have pointed out the advantages of 
pisciculture to a friend who has facilities, and who is at this 
* As it is impossible to go very much into the subject, I have given a list 
of books relating to the art of Piacicultnro “ Book of the .Salmon,” in two 
parts, by Ephemera (Longman and Brown, 1850; “La Pisciculture et la 
Production ties Saugsues, par Jourdier” (Hachette et Co., Paris, 1850) ; “ A 
Treatise on the Propagation of Salmon and other Eish,” Ashworth, (.Simpkin 
and Marshall, ISo.’l); “On Pisciculture,” W. H. Fry, Now York (to bo 
obtaiimd of the publisher, at 30 Soho-stjuare); ainl tlie two woxks of Boccius 
(Van Voorst, Patemoster-row). 
