Nature, Volume 72Sir Norman Lockyer Macmillan Journals Limited, 1905 |
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... means of a guide bar fixed to the lower framework ; two small levers with rollers attached to the upper framework are pressed against this guide bar by means of small weights , thus en- suring the correct direction . The actual motion ...
... means of a guide bar fixed to the lower framework ; two small levers with rollers attached to the upper framework are pressed against this guide bar by means of small weights , thus en- suring the correct direction . The actual motion ...
Página 286
... means of an oscillating electric needle : D. Owen . This paper describes experiments which show how an electric needle may be used to measure electric fields in a manner similar to that in which a magnetic field is The needles measured ...
... means of an oscillating electric needle : D. Owen . This paper describes experiments which show how an electric needle may be used to measure electric fields in a manner similar to that in which a magnetic field is The needles measured ...
Página 466
... Means . Irrigation may be defined as the artificial application of water to land for the purposes of agriculture ... means of keeping it off the fields should be employed . Primitive Means of Irrigation . The earliest and simplest form ...
... Means . Irrigation may be defined as the artificial application of water to land for the purposes of agriculture ... means of keeping it off the fields should be employed . Primitive Means of Irrigation . The earliest and simplest form ...
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