... and frowning as though to concentrate his mind... 
Vicente Blasco Ibáñez Frances Douglas 「The Blood of the Arena」
...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」
...Preferenceshould be given to saline or laxative purges, as, drastic purgatives,such as aloes or jalap, sometimes concentrate the inflammation on thenarrow parts of the digestive channels...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...Now, if the disease came from abroad, and diseased cattle were shippedon the other side of the sea, no doubt the voyage would concentrate andaggravate the disease...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...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」
...Terrapene ornata seems to concentrate its breeding season(laying, incubation, and hatching of eggs) more nearly in themiddle of the warm season than does T...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...Many males concentrate within a few square yards in thechoruses and float upright usually beside or beneath a stem or leaf,or other shelter, rendering them extremely inconspicuous...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...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」
...The reason for this is thought to be anattempt to concentrate on the most inaccessible sites available, whichimplies inroads of hostile peoples...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
...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」
...I want to concentrate...
Various 「Astounding Stories of Super-Science, October, 1930」
...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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