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The average catch for the eleven years, given above, we find to be 581,357; the average catch of the first live years was 637,800, and during the next five years this average was reduced to 518,200. This average, although a decrease from the average of the preceding five years, was considerably increased by the comparatively large catch of the spring of 1871)-tlie first year that the product of artificial propagation was materially felt. If we eliminate the catch of this year and take the average of the four preceding yearsthat is 1875, '76, '77 and '78-we have an average yield for those years of 402,600, but the catch of 1880 was 614,929, an increase of 33,572 over the average catch for the wdiole eleven years, and an increase of 96,729 over the average for the five preceding years, including the year 1879, and 212,329 over the average of the four years immediately preceding the return of the fish produced by artificial means. statement shoioing amount of flsli sold in Wasliington and Alexandria from 1865 to 1880 inclusive.

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