 | John Holmes Agnew, Walter Hilliard Bidwell - 1862 - 602 Seiten
...closely to each other than the males, can be separated with perfect certainty ; nay, even a tail-leather will be sufficient for a person well versed in the...many thousands of humming-birds passing through my hand«, / hate never obserred an instance of any variation which would lead me to suppose that it wan... | |
 | George Douglas Campbell Duke of Argyll - 1867 - 490 Seiten
...passage is so important, that I quote it entire. " It might be thought by some persons that four hundred species of birds so diminutive in size, and of one...the whole of my experience, with many thousands of Humming Birds passing through my hands, I have never observed an instance of any variation which would... | |
 | Robert Mackenzie Beverley - 1867 - 598 Seiten
...this in so many words. Mr Gould proceeds : ' It might be thought by some persons that four hundred species of birds so diminutive in size, and of one...the whole of my experience, with many thousands of Humming Birds passing through my hands, I have never observed an instance of any variation which would... | |
 | Robert Mackenzie Beverley - 1867 - 406 Seiten
...this in so many words. Mr Gould proceeds : ' It might be thought by some persons that four hundred species of birds so diminutive in size, and of one...the whole of my experience, with many thousands of Humming Birds passing through my hands, I have never observed an instance of any variation which would... | |
 | George Douglas Campbell Duke of Argyll - 1873 - 506 Seiten
...the subject, will soon perceive that such is not the case. Even the females, which assimilate mere closely to each other than the males, can be separated...the whole of my experience, with many thousands of Humming Birds passing through my hands, I have never observed an instance of any variation which would... | |
 | Herbert William Morris - 1876 - 736 Seiten
...nearly allied, has never been seen. This is Mr. Gould's testimony : " I mention this fact," he says, " to show that what we designate a Species has really...the whole of my experience, with many thousands of Humming Birds passing through my hands, I have never observed an instance of any variation which would... | |
 | George Douglas Campbell Duke of Argyll - 1884 - 732 Seiten
...passage is so important, that I quote it entire. " It might be thought by some persons that four hundred species of birds so diminutive in size, and of one...the whole of my experience, with many thousands of Humming Birds passing through my hands, I have never observed an instance of any variation which would... | |
 | Diana Donald - 2007 - 402 Seiten
...the publication of Darwin's Origin of Species, he continued to insist, no doubt to avoid controversy, that 'what we designate a species has really distinctive and constant characters', and, moreover, that the birds' 'gorgeous colouring' was given them 'for the mere purpose of ornament', not... | |
 | James Anthony Froude, John Tulloch - 1862 - 846 Seiten
...to each other than the males, can be se] «rated with perfect certainty ; nay, even a tail feather will be sufficient for a person well versed in the...mention this fact to show that what we designate a siH?cies, has really distinctive and constant characters ; and in the whole of my experience with many... | |
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It might be thought by some persons that four hundred species of birds so diminutive in size, and of one family, could scarcely be distinguished from each other; but any one who studies the subject, will soon perceive that such is not the case. Even the... 