It is estimated by men of intelligence that the value of our yearly catch of fish is greater than that of all taken in fresh waters in the thirty-two remaining States of the Union. This may at first blush seem like a broad assertion, but it is no doubt strictly within bounds. If the claim be not too much of the nature of a truism, we may add that so far as quality is concerned the superiority of our finny tribes is even more strongly marked than in regard to quantity. In the sluggish streams that abound in "ten degrees of more effulgent clime," the fish partake of the slimy properties of their native element; it is only in the limpid waters of the North that they are found of flavor so unexceptionable as to please an epicurean taste, or exalt them to the dignity of a staple of commerce. Fish possess peculiar qualities to commend them as an article of food, independent of the arbitrary preference of the epicure. They are universally esteemed as a wholesome and nutritious diet. In that pleasant work, Irving's "Astoria," a tribe of Indians are described who subsisted entirely on fish, whose rotund appearance contrasted strongly with the physique of their brethren of the forest. The profusion with which the finny tribes propagate their species is a peculiarity said to be imparted to those who partake freely and regularly of them for food, a supposition which would seem to be strongly supported by facts. Fishermen are proverbial for the number of their descendants. One of the tribe who dries his nets in Sarnia, is the happy father of nineteen children, and we can cite numerous proofs almost equally striking in support of this theory. The fisheries have always been a leading subject in the government policy of seaboard nations. They are a prime source of revenue, and have been the cause of numerous wars. The serious controversy between the United States and Great Britain concerning the Newfoundland fisheries, is still fresh in the memory of our readers. Recently the earnest attention of the French government has been directed to propositions for the artificial propagation of fish, as a means of affording good and cheap food to the people at a merely nominal cost. The gradual diminution of the species, as well as the ultimate extinction of the large birds and quadrupeds, is everywhere a condition of advanced civilization and the increase and spread of an industrial population. To provide a remedy for the evil, the science of pisciculture has latterly attracted no small degree of attention, and, at this time, gentlemen prominently identified with our fishing interest have it in contemplation to stock lakes in the interior of Michigan with a view to the prosecution of the science.