ScienceJohn Michels (Journalist) 1935 |
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Page 109
... CONSERVATION OF MINERALS1 By Professor C. K. LEIΤΗ * UNIVERSITY OF WISCONSIN L foreign competition , and probably should disappear might be necessary. VOL . 82 The American Association for the Advancement of Science : Conservation of ...
... CONSERVATION OF MINERALS1 By Professor C. K. LEIΤΗ * UNIVERSITY OF WISCONSIN L foreign competition , and probably should disappear might be necessary. VOL . 82 The American Association for the Advancement of Science : Conservation of ...
Page 110
... conservation with the conditions of the present or future economic order , and calls for a careful allocation of duties and powers among private and public agencies . To students of conservation this definition is com- prehensive and ...
... conservation with the conditions of the present or future economic order , and calls for a careful allocation of duties and powers among private and public agencies . To students of conservation this definition is com- prehensive and ...
Page 112
... conservation are now centered in this group of minerals . PRACTICABLE STEPS IN CONSERVATION What , specifically , can be done to advance mineral conservation as thus defined ? To state our general conclusion first , the principal wastes ...
... conservation are now centered in this group of minerals . PRACTICABLE STEPS IN CONSERVATION What , specifically , can be done to advance mineral conservation as thus defined ? To state our general conclusion first , the principal wastes ...
Contents
LOUDERBACK G D Age of the Earth 51 | 1 |
Microphotographs R L IVES 445 | 12 |
Pipettes Broken B N SINGH and P B MATHUR 626 | 13 |
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