 | 1859 - 578 หน้า
...we have now shown that there ia a tendency in nature to the continued progression of certain claasea of varieties further and further from the original type — a progression to which there appeara no reason to assign any definite limits — and tliat the aame principle which produces this... | |
 | Royal Geological Society of Ireland - 1860 - 414 หน้า
...and carries it one step farther, as appears from the following passage : — " We believe we have now shown that there is a tendency in nature to the continued...reason to assign any definite limits — and that the same principle which produces this result in a state of nature will also explain why domestic varieties... | |
 | Geological Society of Dublin - 1860 - 422 หน้า
...and carries it one step farther, as appears from the following passage : — " We believe we have now shown that there is a tendency in nature to the continued progression of certain classes of varieties farther and further from the original type — a progression to which there appears no reason to assign... | |
 | 1860 - 400 หน้า
...and carries it one step farther, as appears from the following passage:— " We believe we have now shown that there is a tendency in nature to the continued progression of certain classes of rarieties further and further from the original type—a progression to which there appears no reason... | |
 | Alfred Russel Wallace - 1870 - 458 หน้า
...of any organ applied to a special purpose in the animal economy. Conclusion. We believe we have now shown that there is a tendency in nature to the continued...reason to assign any definite limits — and that the same principle which produces this result in a state of nature will also explain why domestic varieties... | |
 | 1871 - 588 หน้า
...while those that can prolong their existence can only be the most perfect in health and vigour—those that are best able to obtain food regularly and avoid...of varieties further and further from the original type—a progression to which there appears no reason to assign any definite limits;" and that this... | |
 | Alfred Russel Wallace - 1871 - 412 หน้า
...any organ applied to a special pur» pose in the animal economy. Conclusion* We believe we have now shown that there is a tendency in nature to the continued...of varieties further and further from the original type—a progression to which there appears no reason to assign any definite limits-—and that the... | |
 | Alfred Russel Wallace - 1871 - 434 หน้า
...of any organ applied to a special purpose in the animal economy. Conclusion. We believe we have now shown that there is a tendency in nature to the continued...of varieties further and further from the original type—a progression to which there appears no reason to assign any definite limits—and that the... | |
 | Andrew Wilson - 1883 - 408 หน้า
...may be briefly and plainly stated. Mr. Wallace's conclusion may be summed up in his own expression, " that there is a tendency in nature to the continued...reason to assign any definite limits — and that the same principle which produces this result in a state of nature will also explain why domestic varieties... | |
 | Alfred Russel Wallace - 1891 - 518 หน้า
...of any organ applied to a special purpose in the animal economy. Conclusion We believe we have now shown that there is a tendency in nature to the continued...reason to assign any definite limits — and that the same principle which produces this result in a state of nature will also explain why domestic varieties... | |
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We believe we have now shown that there is a tendency in nature to the continued progression of certain classes of varieties further and further from the original type- -a progression to which there appears no reason to assign any definite limits... 
