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Raamatud Books 1 - 4 of 4 on I mention such details to explain just how obseivations were made and conclusions....
" I mention such details to explain just how obseivations were made and conclusions arrived at. In regard to the second point, with rare exceptions the birds were found to be flying from north-west to south-east. I do not mean that this was absolutely the... "
Bulletin of the Nuttall Ornithological Club - Page 99
by Nuttall Ornithological Club - 1881
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Nature, 24. köide

Sir Norman Lockyer - 1881
...in my identification of Quiscalus purpureus. I mention such details to explain just how obseivations were made and conclusions arrived at. In regard to...a late hour when the height of the moon above the 1 From the Bulletin of the Nuttall Ornithological Club for April. horizon would make the point at which...
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Nature, 24. köide

Sir Norman Lockyer - 1881
...one. It is not within the scope of the present paper to do more than give details on two other point?, namely, the estimated number of birds passing through...a late hour when the height of the moon above the 1 From the Bulletin of the Nuttall Ornithological Club for April. horizon would make the point at which...
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The Auk, 23. köide

1906
...was, therefore, taken as the inferior limit of the field of observation; and on the assumption that birds would not fly at a greater height than ten thousand feet the superior limit of the field was fixed at a distance of four miles. These distances and the angle...
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Nature, 24. köide

Sir Norman Lockyer - 1881
...the tail, from which characteristic I feel most positive in my identification of Quiscalus purpureas. I mention such details to explain just how observations...a late hour when the height of the moon above the 1 From the Bulletin of the Nuttall Ornithological Club for April. horizon would make the point at which...
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