The National ReviewW.H. Allen, 1928 - Great Britain |
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Page 273
The general misapprehension about the flight of birds is this : No bird or machine can extract any pressure from the movement of the medium in which it is supported and operating This simple fact , which may well be called the Law of ...
The general misapprehension about the flight of birds is this : No bird or machine can extract any pressure from the movement of the medium in which it is supported and operating This simple fact , which may well be called the Law of ...
Page 274
some the bird feels no pressure of wind , the effect of these rapid currents is overwhelming . Let us take a swallow with a flight capacity through the air of 50 miles per hour . Assume three conditions of the atmosphere in which it is ...
some the bird feels no pressure of wind , the effect of these rapid currents is overwhelming . Let us take a swallow with a flight capacity through the air of 50 miles per hour . Assume three conditions of the atmosphere in which it is ...
Page 276
birds , flying insects , and fishes , that is to say all single medium creatures , must , with respect to flight or swimming , be machines in the strict ... Suppose a small bird to be bound on a journey across the sea of 100 miles .
birds , flying insects , and fishes , that is to say all single medium creatures , must , with respect to flight or swimming , be machines in the strict ... Suppose a small bird to be bound on a journey across the sea of 100 miles .
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Contents
NATIONAL | 40 |
IRAQ | 49 |
CHESTER THE ARCHDEACON OF The Vote in the Church Assembly | 72 |
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