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Hatching, Feeding, and Temperature

Having procured the eggs, which should be obtained about the latter end of April--they are generally bought on slips of paper just as they were laid by the moth--they should be placed in trays made of stout cartridge or thin pasteboard of the form seen in the cut, and there should be provided to go over the case some thin gauze. The trays may be placed in a window facing the south, where they are fully exposed to the rays of the sun; there they should remain undisturbed till they begin to hatch; and as the young worms appear they should be removed into other trays, and fed with the mulberry leaves. The temperature should be regulated from sixty-six to seventy degrees, and the room ventilated, and preserved equally free from damp or too much dryness. They should be kept particularly clean, dead leaves and dung cleared carefully away, and in lifting them from one tray to another they should not be touched by the fingers, but removed by threads of cotton passed under their bodies, or with a camel's-hair pencil.