. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits. Spiders. STRENGTH OF WEBS AND POWER OF SPIDERS. 239 where it shows as a tissue of close texture. In the building of additions to the web, however, the new part shows as a quite open plane of mesh The webs of Medicinalis are often built in the angles of cellar windows, along the sill, and in positions quite similar to that in which the Batavia snake was caught. The strength of several snares, of Web fo^'^d i^ tli6 cellars of the A
. American spiders and their spinning work. A natural history of the orbweaving spiders of the United States, with special regard to their industry and habits. Spiders. STRENGTH OF WEBS AND POWER OF SPIDERS. 239 where it shows as a tissue of close texture. In the building of additions to the web, however, the new part shows as a quite open plane of mesh The webs of Medicinalis are often built in the angles of cellar windows, along the sill, and in positions quite similar to that in which the Batavia snake was caught. The strength of several snares, of Web fo^'^d i^ tli6 cellars of the Academy of Natural Sciences of Philadelphia, was tested as follows: two webs bore up under a pencil weighing sixty-eight grains; several small webs bore a weight of one-fourth and one-half ounce in corks spread over the surface, but n i\. Fig. 221. The pouch, web, tower, and cocoon of the Medicinal spider, Tegeuaria medicinalis. broke down under an equal weight condensed into a small shell. One web bore up easily, and apparently would have carried for an indefi- nite period, the half ounce shell. It also sustained for a short period a weight of one ounce, and then gradually gave way by the breaking down of the thread attachments to the wall, witliout any yielding of the sheet itself. The weight of a " striped snake," such as is alluded to, probably our common garter snake, Eutaenia sirtalis, Linn., is accurately fifty-five 'The two webs (Fig. 221) measured: No. 1 (upper), 14 inches long across the hypothe- nuse, by 10 inches deep; No. 2 (lower), 18 inches long across the sheeted part, 24 inches across the meshed extension, depth 9 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 McCook, Henry C. (Henry Christopher), 1837-1911. [Philadelphia] The Author, Academy of Natural Science of Philadel
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectspiders, bookyear1889
