 | Geology - 1866 - 470 pages
...acid gas might also be created, such as is supposed to have existed in the coal period. Then it might be seen to what extent our present vegetation would...the air had formerly had a very strong proportion of carbonic acid gas. Until horticulture can supply physiology with such convenient means of experiment,... | |
 | Floriculture - 1866 - 676 pages
...take an excess of carbon from the nir, and if its general existence were inconvenienced by it. Then might be ascertained what tribes of plants could bear...what other families could not have existed, supposing the air had formerly had a very large proportion of carbonic acid gas. Until horticulture can supply... | |
 | Science - 1866 - 736 pages
...take an excess of carbon from the air, and if its general existence were inconvenienced by it. Then might be ascertained what tribes of plants could bear...what other families could not have existed, supposing the air had formerly had a very large proportion of carbonic acid gas." " Horticulture has a commercial... | |
 | Science - 1866 - 658 pages
...take an excess of carbon from the air, and if its general existence were inconvenienced by it. Then might be ascertained what tribes of plants could bear...what other families could not have existed, supposing the air had formerly had a very large proportion of carbonic acid gas." " Horticulture has a commercial... | |
 | Botany - 1866 - 510 pages
...our present vegetation would take an excess of carbon from the air, and if its general existence were inconvenienced by it. Then it might be ascertained...what tribes of plants could bear this condition, and other families could not have existed, supposing the air had formerly had a very strong proportion... | |
 | Biology - 1868 - 770 pages
...take an excess of carbon from the air, and if Its general existence were inconvenienced by it. Then might be ascertained what tribes of plants could bear...what other families could not have existed, supposing the air had formerly had a very large proportion of carbonic acid gas." — Quarterly Journal of Science,... | |
 | United States. Weather Bureau - 1905 - 398 pages
...surrounding air and the influence of a certain composition of the atmosphere upon vegetation, there would lx, by these means a large field open for experiments....botanic laboratory, the author spent his vacation of 1803 in the botanic gardens and greenhouses of Harvard University. On his return to Washington Professor... | |
 | 1866 - 924 pages
...acid gas might also be created, such as is supposed to have existed in the coal period. Then it might be seen to what extent our present vegetation would...the air had formerly had a very strong proportion of carbonic acid gas. Until horticulture can supply physiology with such convenient means of experiment,... | |
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... exact degree of its action by day and by night. An atmosphere of carbonic acid gas might also be created, such as is supposed to have existed in the coal period. Then it might be seen to what extent our present vegetation would take an excess of carbon... 