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.

The American Naturalist

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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 ...

Zoe

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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 ...

The Flora of the Olympics

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 .

Progress in Flying Machines

Author: Octave Chanute

Publisher:

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Page: 308

View: 605

Beskriver gennerelle principper for at flyve og fortæller om de første forsøg på at bygge en egentlig flyvemaskine før det lykkedes at gennemføre en bemandet, motordrevet flyvning

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
.

Report of the Annual Meeting

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 ...

Zoological Record

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"Zoological Record is published annually in separate sections. The first of these is Comprehensive Zoology, followed by sections recording a year's literature relating to a Phylum or Class of the Animal Kingdom. The final section contains the new genera and subgenera indexed in the volume." Each section of a volume lists the sections of that volume.

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 ...

The Zoological Record

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View: 626

Indexes the world's zoological and animal science literature, covering all research from biochemistry to veterinary medicine. The database provides a collection of references from over 4,500 international serial publications, plus books, meetings, reviews and other no- serial literature from over 100 countries. It is the oldest continuing database of animal biology, indexing literature published from 1864 to the present. Zoological Record has long been recognized as the "unofficial register" for taxonomy and systematics, but other topics in animal biology are also covered.

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 .

Report

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 .

The Engineering Index Annual for

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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 ...

American Engineer and Railroad Journal

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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 .

The Engineering Index

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 .

The Living Age

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