The American Naturalist
There is no evidence that a bird in the act of soaring ever remained stationary in
still air for an instant ; and whether air is hurled against ... Solution of the problem
" is unchanged by “ great velocity . ... velocity " to the bird , and as atmospheric
friction is the only resistance to such translation , speed of flight is determined
1891.
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Zoe
September , 1891. The Problem of the Soaring Birds : I. Lancaster . Fossil Birds
from the Equus Beds of Oregon : R. W. Shufeldt , M. D. An abstract of a
forthcoming work on fossil birds from the Upper Pliocene of the Silver Lake
region , Oregon ...
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Essays upon heredity and kindred biological problems v 1 1891
For my part , I am inclined to believe that the habit of flying from man is developed
in the first generation which encounters him as a foe ? We see how wary and
cautious a flock of birds become as soon as a few shots have been fired at them ...
Author: August Weismann
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The Flora of the Olympics
September , 1891. The Problem of the Soaring Birds : I. Lancaster . Fossil Birds
from the Equus Beds of Oregon : R. W. Shufeldt , M. D. An abstract of a
forthcoming work on fossil birds from the Upper Pliocene of the Silver Lake
region , Oregon ...
Author: Louis Fourniquet Henderson
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Page: 296
View: 745
Progress in Flying Machines
In August , 1891 , M. Trouvė , whose mechanical bird with Alapping wings
actuated by explosions within a Bourdon tube ... and drawings of an aeroplane ,
which he believes to be destined to solve successfully the problem of aerial
navigation .
Author: Octave Chanute
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Page: 308
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A Bibliography of Birds
Report of the Annual Meeting
The albatross , the largest web - footed bird , measuring sometimes 17 feet from
tip to tip of wing , and ... The wing - area of soaring birds varies from 1 to above 2
square feet per lb . of weight . The larger the wings per lb ... Field , December 5 ,
1891 , p . 856 . ... 8 Problem of the Soaring Bird , ' American Naturalist , 1885 , pp
.
Author: British Association for the Advancement of Science. Meeting
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Zoological Record
1891 , pp . 273-280 . KENESSEY V. KENESSE , L. Ueber einige seltenere Vögel
des Weissen . burger Comitats . Orn . Jahrb . ii , pp . ... KUTTER , F. ( See
SCHALOW , H. ] LANCASTER , J. The problem of the Soaring Birds . THE
GENERAL ...
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The Zoological Record
1891 , pp . 273-280 . KENESSEY V. KENESSE , L. Ueber einige seltenere Vögel
des Weissen . burger Comitats . Orn . Jahrb . ii , pp . ... KOTTER , F. ( See
SCHALOW , H. ] LANCASTER , J. The problem of the Soaring Birds . THE
GENERAL ...
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Bulletin
Author: Organization for Scientific Research in Indonesia
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Report
The albatross , the largest web - footed bird , measuring sometimes 17 feet from
tip to tip of wing , and weighing up to 20 lb. ... Soaring birds always face the wind ,
which , if they do not move forward or downward , must not blow at a less speed
than 2 to 5 miles ... 1 Field , December 5 , 1891 , p . 856 . * Ibid . , January 22 ,
1887 , p . 114 . 3 • Problem of the Soaring Bird , ' American Naturalist , 1885 , pp .
Author: British Association for the Advancement of Science
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The Engineering Index Annual for
R. H. Thurston , discussing the history of the problem and experiments and
observations upon birds . The Forum ... Article by Mr. O. Chanute containing
illustrations of various flying machines from 1500 to 1879. R. R. & Eng . Four . ,
Nov. 1891 .
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American Engineer and Railroad Journal
In June , 1891 , the quidnuncs in Paris were interested in the rumored success of
some experiments with a flying machine carried on ... M. Ader is a well - known
French electrician , the inventor of a telephone , and has long been interested in
the flyingmachine problem . In 1872 he constructed an artificial bird 26 ft . across
and weighing some 53 lbs . , with beating wings actuated by the muscular force
of ...
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The Engineering Index
R. H. Thurston , discussing the history of the problem and experiments and
observations upon birds . The Forum ... Article by Mr. O. Chanute containing
illustrations of various flying machines from 1500 to 1879. R. R. & Eng . Four . ,
Nov. 1891 .
Author: John Butler Johnson
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The Living Age
... one sees at once that the movement being more advantageous in problem to
be solved by the flying - a machine than a ... It was found already by Leoingly , to
learn from the birds how best uardo da Vinci , and worked out by to utilize the
force ... all experiments proving the considerexcellent guides for this part of the
able lifting powers of a screw - propeller problem ... shall presently be to describe
here in a few words , and shown , a great horizontal speed is the Knowledge ,
1891 , p .
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