Nature, Volume 65Sir Norman Lockyer Macmillan Journals Limited, 1901 |
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Página 227
... object and indicate the direction of the axis of the gun . This end is in practice obtained by projecting a " virtual " image upon the object on which the gun is aimed . By means of the gun - sight now to be described a " virtual ...
... object and indicate the direction of the axis of the gun . This end is in practice obtained by projecting a " virtual " image upon the object on which the gun is aimed . By means of the gun - sight now to be described a " virtual ...
Página 261
... objects , such as men , bushes , rocks , & c . , are essentials , this is an unsuitable instru- ment . In the Barr and Stroud instrument the two images of a distant object are seen with one eye , hence the object appears to be double ...
... objects , such as men , bushes , rocks , & c . , are essentials , this is an unsuitable instru- ment . In the Barr and Stroud instrument the two images of a distant object are seen with one eye , hence the object appears to be double ...
Página 430
... object under examination a very sharp image of the source of illumination . Each point of the object thus gets its light from its own special point of the source ; the object , therefore , acts as if it were self - luminous , and the ...
... object under examination a very sharp image of the source of illumination . Each point of the object thus gets its light from its own special point of the source ; the object , therefore , acts as if it were self - luminous , and the ...
Índice
Gunsights for Large and Small Ordnance 226 a Hart Mr Root Irritation 474 | xxxix |
The Story of Fish Life W P Pycraft 219 Natural History Arthur Smith Woodward F R S 388 | xli |
Galls British Vegetable an Introduction to their Study E T McMurrys Geographies R S Tarr and Frank M McMurry | 13 |
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