. The book of butterflies, sphinges, and moths; illustrated by one hundred and forty-four engravings, coloured after nature. Lepidoptera. 148 THE SILKWORM MOTH. The followJng represents the female Silkworm Moth, about two-thirds of the size of life, in the act of laying her eggs :. The number produced by one female is variously stated. Some accounts mention 250, while others reckon 400 to 500 as the usual number. One of the most astonishing circumstances con- nected with the natural history of SilkwoiTns, is the degi'ce in which their bulk and length are in- creased, and the very limited time
. The book of butterflies, sphinges, and moths; illustrated by one hundred and forty-four engravings, coloured after nature. Lepidoptera. 148 THE SILKWORM MOTH. The followJng represents the female Silkworm Moth, about two-thirds of the size of life, in the act of laying her eggs :. The number produced by one female is variously stated. Some accounts mention 250, while others reckon 400 to 500 as the usual number. One of the most astonishing circumstances con- nected with the natural history of SilkwoiTns, is the degi'ce in which their bulk and length are in- creased, and the very limited time in which that is accomplished. Count Dandolo counted and weighed many a hundred thousand eggs, and found that, on an average, sixty-eight sound Silkworm's eggs weighed one gi-ain. One ounce,'* therefore, com- prised 39,168 eggs. But one-twelfth part of this " This ounce contains 576 giiiins ; of tlicse griiins equal seven grains troy. One ounce avoirdupois is therefore equal to about 533 of these grains, and between onc-twelftli and onc-thirtecntli ounce avoirdupois equals one of the above Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brown, Thomas, 1785-1862. London, Whittaker & Co. ; [etc. ,etc. ]
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Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
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Keywords: ., bookauthorbrownthomas17851862, bookcentury1800, booksubjectlepid
