...The vacuum tubes behind theswitchboard glowed green; a bright white ray poured from the spray inthe chamber, making the metal plate below a shimmering, almost moltenthing... 
Various 「Astounding Stories, August, 1931」
...He felt an agonizing vacuum in his stomach...
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
...There fell the sucking vacuum of a great silence...
Stewart Edward White 「African Camp Fires」
...As the air within thevessel cools it contracts, tending to form a partial vacuum, and the skin,charged with blood, is strongly drawn up within it...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...He was the first to obtain a vacuum by means of mercury; and he also improved the microscope and the telescope...
J. Henri Fabre 「More Hunting Wasps」
..."Remember that the space traveledby a falling body in a vacuum is equalto one half the acceleration multipliedby the square of the elapsed time...
Various 「Astounding Stories of Super-Science February 1930」
...But the creatures in the vacuum were pinned to the spots theyoccupied, as were Madge and Lambert...
Various 「Astounding Stories, April, 1931」
...We started promptly the next morning, after draining the last of thehot chocolate from our vacuum bottles, which we left behind...
Various 「Astounding Stories, April, 1931」
...A row of huge vacuum tubes along the wall lighted to vividbrilliancy and a throbbing vibration filled the artificial air of thecabin...
Various 「Astounding Stories of Super-Science July 1930」
...Our outerhull was weakened by at leasthalf, and we were obliged to increasethe degree of vacuum thereand thus place the major portionof the load on the inner skin...
Sewell Peaslee Wright 「Vampires of Space」
...Afteranother ten minutes in the vacuum tube, we reached our unknowndestination...
Raymond King Cummings 「Wandl the Invader」
...Inordinary laboratory practice this would be called a prettygood vacuum...
George C. Comstock 「A Text-Book of Astronomy」
...The vacuum is greaterthan any ordinary air-pump is capable of producing...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...Illustrations of hallucinations are the hearing of voices when none arepresent, smelling of odors, the seeing of visions in a vacuum...
Dr. D.M. Brooks 「The Necessity of Atheism」
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