. The microscope and its revelations. FIG. 760.—Hair of sable, showing largerounded cells in its interior, coveredby imbricated scales or flattened cells. FIG. 761.—Hair of musk-deer, consist-ing almost entirely of polygonal cells. almost the entire hair seems made up of thin-walled polygonal cells(fig. 761). The hair of the reindeer, though much larger, has a verysimilar structure; and its cells, except near the root, are occupiedwith hair alone, so as to seem black by transmitted light, exceptwhen penetrated by the fluid in which they are mounted. In thehair of the mouse, squirrel, and other
. The microscope and its revelations. FIG. 760.—Hair of sable, showing largerounded cells in its interior, coveredby imbricated scales or flattened cells. FIG. 761.—Hair of musk-deer, consist-ing almost entirely of polygonal cells. almost the entire hair seems made up of thin-walled polygonal cells(fig. 761). The hair of the reindeer, though much larger, has a verysimilar structure; and its cells, except near the root, are occupiedwith hair alone, so as to seem black by transmitted light, exceptwhen penetrated by the fluid in which they are mounted. In thehair of the mouse, squirrel, and other small rodents (fig. 762, A, B), the cortical substance forms a B C tube, which we see crossed atintervals by partitions thatare sometimes complete,sometimes only partial;these are the walls of the singleor double line of cells, of whichthe medullary substance is madeup. The hairs of the bat tribeare commonly distinguished bythe projections on their surface,which are formed by extensionsof the component scales of thecortical subs
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
