Science, Volumen51John Michels (Journalist) American Association for the Advancement of Science, 1920 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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Página 18
... acid ; and if not , what changes occur in these minerals to make them acid and what factors cause these changes . Therefore in some work on soil acidity that has recently been done in this laboratory , the problem was attacked along a ...
... acid ; and if not , what changes occur in these minerals to make them acid and what factors cause these changes . Therefore in some work on soil acidity that has recently been done in this laboratory , the problem was attacked along a ...
Página 19
... acids or acid salts pres- ent in the solutions of acid soils , and of the decomposition products ; and that with all of the materials some of the calcium hydroxide is entirely removed from the field of action . These statements are ...
... acids or acid salts pres- ent in the solutions of acid soils , and of the decomposition products ; and that with all of the materials some of the calcium hydroxide is entirely removed from the field of action . These statements are ...
Página 20
... acids with ethyl alcohol forms a valuable im- munizing substance as these fatty acids have so far been found not to conform to those found in our common food products . Esterification of the higher alcohols with salicylic benzoic ...
... acids with ethyl alcohol forms a valuable im- munizing substance as these fatty acids have so far been found not to conform to those found in our common food products . Esterification of the higher alcohols with salicylic benzoic ...
Página 67
... Acid extracts . ( c ) Full analyses . 2. Gases . Chemical properties of soil air . ( c ) Biotic properties . All life plant as well as animal , influencing the soil . II . Factors influencing the distribution of aquatic plants and ...
... Acid extracts . ( c ) Full analyses . 2. Gases . Chemical properties of soil air . ( c ) Biotic properties . All life plant as well as animal , influencing the soil . II . Factors influencing the distribution of aquatic plants and ...
Página 68
... ( acid- ity or alkalinity ) . ( 3 ) Influence on ventilation . ( 4 ) Effect on plant roots . XXIV . Selective absorption of roots in soil . ( 1 ) Under different soil moisture con- ditions . ( 2 ) Under different atmospheric con- ditions ...
... ( acid- ity or alkalinity ) . ( 3 ) Influence on ventilation . ( 4 ) Effect on plant roots . XXIV . Selective absorption of roots in soil . ( 1 ) Under different soil moisture con- ditions . ( 2 ) Under different atmospheric con- ditions ...
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Página 239 - THE Bruce Gold Medal of the Astronomical Society of the Pacific has been awarded to Professor Ernest W. Brown, of Yale University, for " distinguished services to astronomy.
Página 298 - Functions of the Division of Geology and Geography of the National Research Council.
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Página 284 - ... to know the histories of the animals and plants upon which they feed or upon which their food is nourished; the histories of their enemies and friends and the friends and foes...
Página 553 - Papers from the Department of Biometry and Vital Statistics, School of Hygiene and Public Health, Johns Hopkins University, No.