Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 321
Fig. 249.—Maddoxs growing stage. … Fig. 250.—Dallinger and Drysdales moist continuous growing stage. aperture, b, is cut through it, and a thin piece of good glass, c, d,c, j\is fixed over the under surface of it with Canada balsam : this maybe as thin as the condenser may require. At the end of the arm«, which extends some distance…
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