... "Well, there are, of course, various parties back of the change: the 'outs,' the reformers, the whole tendency to concentrate responsibility, and so on... 
W. E. B. Du Bois 「The Quest of the Silver Fleece」
...These wintering crows concentrate in the western partof the study area where the flat, fertile wheat fields of central HarveyCounty are replaced by sand dunes and the sandy Arkansas River Valley...
Dwight Platt 「Food of the Crow, Corvus brachyrhynchos Brehm, in South-central Kansas」
...With my elbows on the table and my thumbs behind my ears, I concentrate all my attention...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...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」
...In the spring and summer they concentrate near thenorthern limits of their range, occasionally visiting deepchannels of the Gulf of St...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The red-headed woodpecker on the area tendsto concentrate its activities where there are red oaks...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...If we turn from Australian to Indian snakes, the peculiar tendency ofthe poison to concentrate its action on special nerve-centres becomesstill more marked...
A. Mueller 「On Snake-Poison: its Action and its Antidote」
...An exceedingly good shepherd's dog appears to concentrate all his powersin his own immediate vocation; and in this does he exert and exhaust hiswhole capacity...
R. Lee 「Anecdotes of the Habits and Instinct of Animals」
...We may now disregard both the outer ovolemma and the greater part of thevesicle, and concentrate our attention on the germinative area and thefour-layered embryonic disk...
Ernst Haeckel 「The Evolution of Man」
...They attempted to concentrate the productof the Navajo wool trade at this point and to establish here acompletely appointed woolen mill...
Victor Mindeleff and Cosmos Mindeleff 「A Study of Pueblo Architecture: Tusayan and Cibola」
...As has already been explained, it is not sufficient in drawingto concentrate the attention on copying accurately the visualappearance of anything, important as the faculty of accurateobservation is...
Harold Speed 「The Practice and Science Of Drawing」
...This practical way of indicating dutieshelped the heedless to concentrate their attention,and did much to increase the number ofprayers offered...
Dolores Bacon 「Pictures Every Child Should Know」
..."It was in the very nature of the Athenian dramathat, when once established, it should concentrate and absorbalmost every variety of poetical genius...
Marcius Willson 「Mosaics of Grecian History」
..."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」
...McGuire glared back into that face,and he tried with all the mental forcethat he could concentrate to get acrossto the exultant one the fact that theyhad not wholly conquered him...
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」
...I want to concentrate...
Various 「Astounding Stories of Super-Science, October, 1930」
...Yet actually I believe it would have required aconsiderable commotion to have distracted his attention, for hisability to concentrate was one of the characteristics of his genius...
Various 「Astounding Stories of Super-Science, October, 1930」
...Let us concentrate ourattention specially upon that line of the solar spectrum marked ...
Robert Stawell Ball 「The Story of the Heavens」
...The only difficulty is how to concentrate and utilizethis wasted energy...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
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