| Nicholas Patrick Wiseman - 1860 - 594 pages
...next year produced two, and so on, then in twenty years there would be a million plants. The elephant is reckoned the slowest breeder of all known animals,...increase : it will be under the mark to assume that it breeds when thirty years old, and goes on breeding till ninety years old, bringing forth three pair... | |
| John Holmes Agnew, Walter Hilliard Bidwell, Henry T. Steele - 1860 - 612 pages
...two, and so on, then in twenty years there would be a million plants. The elephant is reckoned to be the slowest breeder of all known animals, and I have...some pains to estimate its probable minimum rate of nutur-.il increase ; it will be tinder the mark to assume that it breeds when thirty years old, and... | |
| 1860 - 982 pages
...twenty years there would ho ;x million plants. The elephant is reckoned to he the slowest breeder of alt known animals, and I have taken some pains to estimate...probable minimum rate of natural increase : it will bo under the mark to assume, that it breeds when thirty years old, and goes on breeding till ninety... | |
| 1861 - 788 pages
...year "produced two, and so on, then in " twenty years there would be a million " plants. The elephant is reckoned the " slowest breeder of all known animals,...increase. It will be under the "mark to assume that it breeds when " thirty years old, and goes on breeding " until ninety years old, bringing forth " three... | |
| 1861 - 520 pages
...year "produced two, and so on, then in " twenty years there would be a million " plants. The elephant is reckoned the " slowest breeder of all known animals,...increase. It will be under the "mark to assume that it breeds when " thirty years old, and goes on breeding ' until ninety years old, bringing forth ' three... | |
| Charles Darwin - 1861 - 470 pages
...two, and so on, then in twenty years there would be a million plants. The elephant is reckoned to be the slowest breeder of all known animals, and I have...increase : it will be under the mark to assume that it breeds when thirty years old, and goes on breeding till ninety years old, bringing forth three pair... | |
| 1861 - 824 pages
...years there would be a million of plants. The elephant is reckoned to be the slowest breeder of all animals ; and I have taken some pains to estimate...increase. It will be under the mark to assume that it breeds when thirty years old, and goes on breeding till ninety years old, bringing forth three pair... | |
| 1861 - 562 pages
...next year produced two seeds, and so on, in thirty years there would be a million plants. The elephant is reckoned the slowest breeder of all known animals, and I have taken some pains to calculate its probable minimum rate of natural increase ; it would be under the mark to assume that... | |
| James Samuelson, Henry Lawson, William Sweetland Dallas - 1876 - 508 pages
...than a thousand years there would literally not be standing-room for his progeny. . . . The elephant is reckoned the slowest breeder of all known animals,...probable minimum rate of natural increase. It will be safest to assume that it begins breeding when thirty years old, and goes on breeding till ninety years... | |
| 1862 - 838 pages
...next year produced two, and so on, then in twenty years there would be a million plants. The elephant is reckoned the slowest breeder of all known animals, and I have taken Bome pains to estimate its probable minimum rate of natural increase. It will be under the mark to... | |
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