Nature, Količina 104Sir Norman Lockyer Macmillan Journals Limited, 1919 |
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Zadetki 1–3 od 81
Stran 171
... present negligible ; even the Maikop field , the first borings in which aroused so much excitement , has sunk to a quite unim- portant factor in the general production . Of the other non - metallic minerals , bitumen is at present the ...
... present negligible ; even the Maikop field , the first borings in which aroused so much excitement , has sunk to a quite unim- portant factor in the general production . Of the other non - metallic minerals , bitumen is at present the ...
Stran 185
... present generation , but no scheme has yet been evolved to make its application possible . There can be no doubt that in this respect our present system is a complete failure . It has been built up casually in the course of the ...
... present generation , but no scheme has yet been evolved to make its application possible . There can be no doubt that in this respect our present system is a complete failure . It has been built up casually in the course of the ...
Stran 707
Sir Norman Lockyer. with certainty that a particular type of implement was present . Mr. Reid Moir's collection appeared to him to present all the characteristics which one would expect to find in a group of implements belonging to the ...
Sir Norman Lockyer. with certainty that a particular type of implement was present . Mr. Reid Moir's collection appeared to him to present all the characteristics which one would expect to find in a group of implements belonging to the ...
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