An Inventors' Congress. Comments on Letter of Mr. Daniel Ruggles. Rye Roots in Ice. Ants as Fruit Growers' Friends. t Harrison's Moon Pictures. 40 4 4 Fresh Water Sponges., scientific american, 1881-07-16


An Inventors' Congress. Comments on Letter of Mr. Daniel Ruggles. Rye Roots in Ice. Ants as Fruit Growers' Friends. t Harrison's Moon Pictures. 40 4 4 Fresh Water Sponges., scientific american, 1881-07-16


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