ScienceJohn Michels (Journalist) 1953 |
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Стр. 26
... present in large quantities in recent marine sediments and that many ancient clays and shales contain chemically ... present in the dissolved solids of fluviatile waters . Sverdrup ( 3 ) gave no value for the SiO2 as a dissolved solid in ...
... present in large quantities in recent marine sediments and that many ancient clays and shales contain chemically ... present in the dissolved solids of fluviatile waters . Sverdrup ( 3 ) gave no value for the SiO2 as a dissolved solid in ...
Стр. 27
... present in the great majority of the sam- ples and in the majority of cases in amounts from 10-50 % . This would seem to substantiate the hypothe- sis that there is a large quantity of silica in the form of the mineral quartz in the ...
... present in the great majority of the sam- ples and in the majority of cases in amounts from 10-50 % . This would seem to substantiate the hypothe- sis that there is a large quantity of silica in the form of the mineral quartz in the ...
Стр. 537
... present communication is based on a prelimi- nary analysis of a portion of these studies . A more complete account ... Present address : Institute of Human Biology , University of Michigan , Ann Arbor , Michigan . 3 Present address ...
... present communication is based on a prelimi- nary analysis of a portion of these studies . A more complete account ... Present address : Institute of Human Biology , University of Michigan , Ann Arbor , Michigan . 3 Present address ...
Содержание
News and Notes | 38 |
21 | 40 |
A Quantitative Analysis of the Factors Involved in | 49 |
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