...New grass also operates medicinally upon thesystem... 
Robert Jennings 「Sheep, Swine, and Poultry」
...She operates under my lens, she operates just beside my forceps...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
... I am doubly surprised when I consider the unfavourable conditions under which the Scolia operates...
J. Henri Fabre 「More Hunting Wasps」
...This tube operates the relay which closes a valve and shuts offthe supply of acid...
Various 「Astounding Stories, March, 1931」
...It is something like radio—at least it operates with vibrationsin the ether—but it's as much ahead of our radio as an airplane is inadvance of a fire-balloon...
Various 「Astounding Stories, July, 1931」
...A strip of paper is carried over these wheels andmoved forward by the same electro-magnet, which operates the printinghammers...
Wm. Gaertner & Co. 「Astronomical Instruments and Accessories」
...In the twentieth century, as in the nineteenth, the eighteenth, or inancient epochs, the same awe and terror operates upon the ignorantpopulations who abound upon the surface of our planet...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...This boon,however, in some instances, operates unfairly...
John Lort Stokes 「Discoveries in Australia, Volume 2」
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