Evenings at the microscope : or, Researches among the minuter organs and forms of animal life (1884)
Gosse, Philip Henry, 1810-1888 · London : Society for Promoting Christian Knowledge · leaf 219
acid nature, as experiments performed with irritatedspiders prove; litmus paper pierced by them becoming redas far round the perforations as the emitted fluid spreads.In the slough, the upper surface of the cephalo-thoraxis always detached as a thin plate, convex outwardly, con-cave inwardly. As it… … SPIDERS AND MITES. 207 from its thinness is semi-pellucid, but the eyes transmitthe light with brilliance, not, however, as if they weresimple round holes, because you can discern very mani-festly a hemispherical glassy coat, by which it is refracted.It is, however, when we examine the forehead of…
Zoology · Microscopy
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