...By an effort I freed myself from my fancies and tried to concentrate my brain on the facts of our position... 
Anthony Hope 「Rupert of Hentzau」
...Sei whales usually travel in groups of from two to fiveindividuals, though they may concentrate in large numberson the feeding grounds...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The policy of the Indian Office from the beginning had been to concentrate the various bands upon one reservation at San Carlos...
Edward S. Curtis 「The North American Indian」
..."We'll concentrate, but our machine-shops and supplies will concentratewith us...
Victor Rousseau 「Astounding Stories of Super-Science January 1930」
...It disperses the light,doesn't concentrate it! Ah! Here isanother, and another...
Various 「Astounding Stories of Super-Science February 1930」
..."Please try to concentrate, and see if any effective weaponsuggests itself to you—something more available at the moment thanmachine-guns...
Various 「Astounding Stories of Super-Science September 1930」
... concentrate hispower on any individual...
Various 「Astounding Stories of Super-Science September 1930」
...My oldproblems—I can concentrate on them...
Various 「Astounding Stories of Super-Science, December 1930」
...If wenow pass this beam of light through alens in order to concentrate the beam,both the pipe of heat and the cold corewill focus...
Various 「Astounding Stories of Super-Science, March 1930」
...Wilcox, of course, neverexplains an order, but the reason for having only one operator on thejob is simply to concentrate responsibility on that one man...
Roman Frederick Starzl 「The Martian Cabal」
...We would simply enforce our authority until we located definiteresistance; we would then concentrate our efforts upon isolating thesource of this resistance and overcoming it...
Sewell Peaslee Wright 「Priestess of the Flame」
...The only difficulty is how to concentrate and utilizethis wasted energy...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...Or the different sectionswould march out independently, and concentrate on a point agreed upon...
Joseph Lievesley Beeston 「Five Months at Anzac」
...Nature now seemed tointend to concentrate all the usual heat of an Australian summer intothe two remaining months that were left to her...
Ernest Giles 「Australia Twice Traversed, The Romance of Exploration」
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