Memorial of Dr. H. A. Hagen, Professor of Harvard University; Professor Smith, of Yale College; P. R. Uhler, President Maryland Academy of Sciences; J. L. Le Conte, Charles A. Blake, and other entomologists in the United States, in favor of the purchase by the government of the engraved plates prepared by Professor Townend Glover, illustrating the insects of the North American continent

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by United States. Congress. Senate. Committee on Agriculture