...Whether diet operates in the same degree to effect changes I aminclined to doubt... 
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...By the second method Philanthus operates standing upright...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...She operates under my lens, she operates just beside my forceps...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...Then selection operates to meet the needs forsupport within the limits that are set by the necessity to providethe protection for vital organs...
Richard C. Fox 「The Adductor Muscles of the Jaw In Some Primitive Reptiles」
...Sometimes the rain-charm operates through the dead...
Sir James George Frazer 「The Golden Bough」
...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」
...Another point to be considered is that the bird operates by theapplication of a kind of force which is peculiar to the animalcreation, and no approach to which has ever been made in any mechanism...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...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」
...This boon,however, in some instances, operates unfairly...
John Lort Stokes 「Discoveries in Australia, Volume 2」
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