Matter, ether, and motion; the factors and relations of physical science (1892)
Dolbear, A. E. (Amos Emerson), 1837-1910 · Boston, Lee and Shepard · leaf 168
hundred feet in asecond in ordinary air; so the pres-sure will be equalized in a very shortinterval of time. If the air be rare-fied in front of such surface to such a degree that thefree path of the molecule is many times greater thanits ordinary length, that pressure cannot get roundnearly so… … Diag. 12. — Radiometer. 156 MATTER, ETHER, AND MOTION produced by a relatively small number of molecules ;but it may be made apparent by mounting some disks,blackened on one side, upon a pivot in a glass bulb,and, after exhausting a large part of the air, hermeti-cally sealing the bulb. Such a…
Physics
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