Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 320
1^17, con i t ,of a slip of ebonite, three inches by one, with a central aperture ofthree-fourths of an inch at its under side ; this aperture is reducedby a projecting shoulder, whereon is cemented a disc of thin glass,which thus forms the bottom of a cell hollowed in the thickness ofthe ebonite… … Fig. 247. of water or other fluid, which is imparted, as required, to the central growing cell, which is completed by placing a thin glass cover overthe objects introduced into it, with the interposition of a ring of thinpaper, or (if a greater thickness be required) of a ring of cardboardor…
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