...There are two estimates ofthe number of slaves in this colony:—... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...There is great discrepancy in the various estimates as to the number of slaves annually exported from Africa...
Horatio Bridge 「Journal of an African Cruiser」
..., estimates that fifteen thousand are annually sent to the West Indies, and a greater number to Arabia, all of which are from Portuguese settlements...
Horatio Bridge 「Journal of an African Cruiser」
... Sir Harry Johnston estimates 135,000,000 Negroes, of whom 24,591,000live in America...
W.E.B. Du Bois 「The Negro」
..."The estimates of buffalo, elk, antelope, deer, sheepand bear are based on actual counts, or very close observations, andare pretty nearly correct...
William T. Hornaday 「Our Vanishing Wild Life」
...The methods used by other investigators to calculate the home range of the cottontail have yielded estimates varying from 0...
Donald W. Janes 「Home Range and Movements of the Eastern Cottontail in Kansas」
...It is recognized that field estimates cannot be as precise asmost of the conversions used...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...Data obtained inthis manner may be used as the foundation of estimates ofcetacean populations, estimates which are extremely difficultto obtain by any other method...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...These estimates fall within therange of food consumption figures estimated forwolves in the wild (Mech and Frenzel 1971)...
Thomas F. Weise 「An Experimental Translocation of the Eastern Timber Wolf」
...The study did not yield precise population estimates...
Sydney Anderson 「Mammals of Mesa Verde National Park, Colorado」
...The first estimates of abundance on the Range Reserve were fromactual counts of dens on areas measured off for experimental fencing,and gave the figure of about two mounds to the acre...
Charles T. Vorhies and Walter P. Taylor 「Life History of the Kangaroo Rat」
...Mary's schools, and, whenever any extensionswere made at them, he always, on having the plans and estimates submittedto him, defrayed one-third of the expenses...
Atticus 「Our Churches and Chapels」
...It must, no doubt, beadmitted that the numerical estimates we employ have to be received witha certain degree of caution...
Robert Stawell Ball 「The Story of the Heavens」
...Whatever estimates we may attempt to form cannot however be regarded asat all exact, for we know the actual distances of such a very few onlyof the nearest of the stars...
Cecil G. Dolmage 「Astronomy of To-day」
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