...This neglect certainly conspireswith many others to cause a decrease in the births as well as in thelives of the grown negroes... 
Olaudah Equiano 「The Interesting Narrative of the Life of Olaudah Equiano, Or Gustavus Vassa, The African」
...Do the British colonies decrease in this manner? Andyet what a prodigious difference is there between an English and WestIndia climate?...
Olaudah Equiano 「The Interesting Narrative of the Life of Olaudah Equiano, Or Gustavus Vassa, The African」
... As the population increases, the alligators will decrease, for their nests will be oftener found; the principal check on their inordinate multiplication seems to be man...
David Livingstone 「Missionary Travels and Researches in South Africa」
... It is a little remarkable that a decrease in size should occur where food is the most abundant; but tropical climates seem unfavorable for the full development of either animals or man...
David Livingstone 「Missionary Travels and Researches in South Africa」
...In a preceding period the loss was greater; and, in a period before that greater still; there having been a continual gradation in the decrease through the whole time...
Thomas Clarkson 「The History of the Rise, Progress and Accomplishment of the」
...Some had the feeling that in proportion as the Negro received education, in the same proportion would his value decrease as an economic factor in the state...
Booker T. Washington 「Up From Slavery: An Autobiography」
..." In Vermont, however, thesituation is kept so well in hand we may be sure that at the rightmoment the law providing for the decrease of the number of does willbe repealed...
William T. Hornaday 「Our Vanishing Wild Life」
...There is much said as to the rapid decrease of game...
Eldred Nathaniel Woodcock 「Fifty Years a Hunter and Trapper」
...Then the following year they decrease in numbers to what they were two years before, and the winter following so few that one or two about in miles of coast is a rarity...
A. R. (Arthur Robert) Harding 「Fox Trapping」
...In the tenyears between the census of 1900 and that of 1910there was a decrease in the number of ducks ofnearly 40%...
Harry M. Lamon 「Ducks and Geese」
... Another group of cottonmouths from which venom was extracted over a period of five years also showed no decrease in yield or toxicity...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Though they have decreased innumbers, the decrease is by no means as greatas of the blacktail, and a good many can beshot yet...
Various 「Hunting in Many Lands」
...Mountain sheep were never very plentiful, andduring the last dozen years they have decreasedproportionately less than any othergame...
Various 「Hunting in Many Lands」
...1; in the sixth column the difference between the actual and calculated capacities, and in the seventh the percentage of increase or decrease, are given...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
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