 | Thomas Robert Malthus - 1807 - 606 頁
...every twenty-five years by the power of population as a thoufand. But the food to fupport the increafe from the greater number will by no means be obtained with the fame facility. Man is neceflarily confined in room. When acre has been added to acre till all the fertile... | |
 | Thomas Robert Malthus - 1809 - 576 頁
...their increase must be totally of a different nature from the ratio of the increase of population. A thousand millions are just as easily doubled every...is necessarily confined in room. When acre has been added to acre, till all the fertile land is occupied, the yearly increase of food must depend upon... | |
 | Thomas Southwood Smith - 1822 - 464 頁
...sufficient attention has not been paid. Further, he maintains, that while a thousand millions of people are as easily doubled every twenty-five years by the power of population, as a thousand, the food to support this vast increase can by no means be obtained with the same facility ; that man... | |
 | William Hough - 1825 - 1028 頁
...doubled every 25 years, by the power of population, as 1,OOO. But the food to support the increase or the greater number will by no means be obtained with the same facility.*'— (Malthus on Population, vol. i, p. 9.) We are accordingly emigrating to foreign lands and colonizing;... | |
 | Thomas Robert Malthus - 1826 - 566 頁
...limited territory must be of a totally different nature from the ratio of the increase of population. A thousand millions are just as easily doubled every...will by no means be obtained with the same facility. jMan is necessarily confined in room. When acre has been added to acre till all the fertile land is... | |
 | Michael Thomas Sadler - 1830 - 712 頁
...unchecked, goes on doubling every twenty-five " years, or increases in a geometrical ratio1," and " that a thousand millions are just as easily doubled, "...twenty-five years, by the power of population, " as one thousand2," — is, as it respects its natural progress, not only erroneous, but impossible : —... | |
 | Elhanan Winchester - 1844 - 722 頁
...sufficient attention has not been paid. Further, he maintains, that, while a thousand millions of people are as easily doubled every twenty-five years, by the power of population, as a thousand, the food to support this vast increase сea by no means be obtained with the same facility — that... | |
 | sir George Kettilby Rickards - 1854 - 316 頁
...limited territory must be of a totally different nature from the ratio of the increase of population. A thousand millions are just as easily doubled every...is necessarily confined in room. When acre has been added to acre till all the fertile land is occupied, the yearly increase of food must depend upon the... | |
 | Sir George Kettilby Rickards - 1854 - 286 頁
...limited territory must be of a totally different nature from the ratio of the increase of population. A thousand millions are just as easily doubled every...is necessarily confined in room. When acre has been added to acre till all the fertile land is occupied, the yearly increase of food must depend upon the... | |
 | William Tait, Christian Isobel Johnstone - 1854 - 780 頁
...unchecked, goes on. doubling every twenty-five years, or increases in a geometrical ratio" — adding that "a thousand millions are just as easily doubled every...years, by the power of population, as a thousand" — he proceeds to consider the productive powers of the earth, and arriving at a conclusion in support... | |
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A thousand millions are just as easily doubled every twenty-five years by the power of population as a thousand. But the food to support the increase from the greater number will by no means be obtained with the same facility. 
