The Fur Seals And Fur Seal Islands of the North Pacific Ocean volume 1
The Fur Seals And Fur Seal Islands of the North Pacific Ocean volume 1
United States Dept of the Treasury Commission O
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No closer accuracy is claimed for the figures, and none is needed. The margin of error can not be greater than this. THE CENSUS OF 1897. In making the census of 1897 no such difficulty as that encountered in 1896 was met with. From the start we had a clear idea of the problem and were guided by the experience obtained in the work of the former season. The first thing to be done was to make a full enumeration of the breeding harems on all the rookeries at the height of the season. The remaining ...step was to obtain an average size of harem by making a count of live pups on some typical rookery space. Accordingly between the period of July 13 and 20 the count of harems was made. For purposes of comparison the cows actually present on rookeries counted last year were recounted this year on the same dates. THE COUNT OF PUPS IN 1897. The count of pups was made between the 28th of July and the 3d of August. A comparison of the number of pups with the number of cows counted showed clearly the inadequacy of our correction of 75 per cent for absent cows in the original census of 1896.
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