Nature, Volume 104Sir Norman Lockyer Macmillan Journals Limited, 1919 |
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Página 33
... means ships steaming in fog can be given their positions with accuracy for ranges up to 500 miles . Among the many other important technical systems and devices brought out during the war which will find useful application under peace ...
... means ships steaming in fog can be given their positions with accuracy for ranges up to 500 miles . Among the many other important technical systems and devices brought out during the war which will find useful application under peace ...
Página 248
... means many useful deductions have been drawn . It is impossible in a brief article to give any full statement of the present position of meteoro- logy , but a short account of the great access of knowledge that has come to us in the ...
... means many useful deductions have been drawn . It is impossible in a brief article to give any full statement of the present position of meteoro- logy , but a short account of the great access of knowledge that has come to us in the ...
Página 277
... means of earthenware , cement , or iron pipes fixed vertically in the soil . The great losses by evaporation that always occur in open canals and in surface irrigation are thus avoided . M. Parmentier remarks that with vertical - pipe ...
... means of earthenware , cement , or iron pipes fixed vertically in the soil . The great losses by evaporation that always occur in open canals and in surface irrigation are thus avoided . M. Parmentier remarks that with vertical - pipe ...
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