The Encyclopedia Americana, Količina 1Alexander Hopkins McDannald Americana Corporation, 1949 |
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Zadetki 1–3 od 72
Stran 50
... various polish uses . The principal deposits are in Mis- souri and Oklahoma ; also Tennessee and Geor- gia . Annual production is about 25,000 tons , of which about one half is for abrasive uses . Feldspar is used in scouring soaps ...
... various polish uses . The principal deposits are in Mis- souri and Oklahoma ; also Tennessee and Geor- gia . Annual production is about 25,000 tons , of which about one half is for abrasive uses . Feldspar is used in scouring soaps ...
Stran 244
... various crops in large tanks of prepared solutions of essential elements ( hydroponics , q.v. ) has been accomplished successfully by a few experimenters , but the economic value of this method of culture has yet to be proved . The ...
... various crops in large tanks of prepared solutions of essential elements ( hydroponics , q.v. ) has been accomplished successfully by a few experimenters , but the economic value of this method of culture has yet to be proved . The ...
Stran 322
... various official acts of Canada . Various maps were produced to show that Rus- sia had been entitled to the disputed territory and that after the purchase of Alaska that same territory was mapped and charted as belonging to the United ...
... various official acts of Canada . Various maps were produced to show that Rus- sia had been entitled to the disputed territory and that after the purchase of Alaska that same territory was mapped and charted as belonging to the United ...
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