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according action agricultural amount annual atmosphere August average beginning cent changes chemical climate considered constant contained crop cultivation daily temperatures December depends depth determined early earth effect evaporation experiments fact favorable fertilizers flowering following table germination given gives grain grass growing growth harvest heat important inches increase influence intensity July June latter leafing leaves less light limit March maximum mean mean daily measured method moisture months natural nitrogen November observations obtained October organic period plants present produced proportion quantity radiation rain rainfall received relation relative ripening roots season seed Sept September shown shows similar soil sowing sown species spring stations sum total sunshine surface temperature thermometer tion ture varieties vegetation weight wheat wind winter
Page 158 - ... were floating in the air and were deposited in the pots in which the plants grew.
Page 25 - ... 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 from the air, and if its general existence was inconvenienced by it. Then it might be ascertained what tribes of plants could bear this condition, and what other families could not have existed, supposing that the air had formerly had a very strong...
Page 297 - Bahamas, and Signer Filippo Partatori (Florence, 1866) saying it came from Cat Island, one of the Barbadoes. "But as Anguilla is one of the Barbadoes, and Cat Island one of the Bahamas, it would seem difficult to decide to which group of islands we are indebted for these seed.
Page 298 - ... staple cultivated now was derived. Nor have the improvements made by careful selection of the seed ceased in later years. The staple has kept fully up to the best grades of former days, and the proportion of lint to seed cotton has been increased. Formerly one pound of lint cotton from five pounds of seed cotton of the fine varieties was considered satisfactory.
Page 298 - C, obtained some of these seeds from Georgia and planted them. This crop failed to mature, and the first successful crop of long staple cotton grown in South Carolina was planted in 1790, by William Elliott, on the northwest corner of Hilton Head, on the exact spot where Jean Ribault landed the first colonists and erected a column of stone, claiming the territory for France, a century before the English settled on the coast. Mr. Elliott's crop sold for \oY2A.
Page 66 - Leguminosse are conspicuous as furnishing us with important dyes, eg, indigo, logwood, catechin. The former is obtained principally from different species of the genus Indigofera, and logwood from the Hcematoseylon campechianum, but catechin from the Acacia catechu.
Page 361 - Étude sur la Force chimique contenue dans la lumière du Soleil, la mesure de sa puissance, et la détermination des climats quelle caractérise, par Eug. Marchand. — Paris, Gauthier-Villars, in-8".
Page 261 - July 26 July 27 July 28 July 29 July 30 July 31 Aug. 1 Aug. 2 Aug. 3 Aug. 4 Aug. 5 Aug. 6 Aug. 7 Aug. 8 Aug.
Page 298 - Since then the greatest care has been bestowed upon the selection of the seed, and to such perfection was the staple brought by this means that the crops of some planters were sold not by sample, but by the brand on the bale, as are the finest wines.
Page 25 - Under the yellow glass the varied tint of the leaves was preserved. The red glass impeded the development of the leaves, and produced at the base of the limb, yellow instead of green; in the middle of the upper surface, yellow instead of reddish brown ; and below, a red spot instead of purplish red. With the blue glasses, which allowed some green and yellow to pass, that which was red or yellow in the leaf had spread so that there remained only a green border or edge. Under the nearly pure violet...