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Updated: May 12, 2025
I there observed striated fragments of dolomite and gypsum, which had come down from Mont Cenis and had travelled as far as Avigliana; also masses of serpentine brought from less remote points, some of them apparently exceeding in dimensions the largest erratics of Switzerland.
"Just think of this in New York! You can't see it very well at night, but when the southern sun pours in here all the afternoon " "Yes, I can imagine it," he said. He glanced up at the bird-cage hanging from the roof. "I suppose Gypsy enjoys it." "You remember Gypsy?" she said; and she made a cooing, kissing little noise up at the bird, who responded drowsily. "Poor old Gypsum!
After visiting Longwood and Napoleon's tomb we rode to Flagstaff Hill to search for fossil shells. The whole soil that I saw was composed of decomposed old volcanic rocks; but I saw no rock but basalt in different stages of decomposition; sometimes it assumed the form of porphyry. I also saw veins of quartz, gypsum, and jasper.
To enlarge on the numerous subdivisions of the Parisian strata would lead me beyond my present limits; I shall therefore give some examples only of the most important formations. Beneath the Gres de Fontainebleau, belonging to the Lower Miocene period, as before stated, we find, in the neighbourhood of Paris, a series of white and green marls, with subordinate beds of gypsum.
I consider the success of this experiment to be in a great measure owing to the use of soluble silica and magnesia; because, although there is an abundance of silica in the soil, my first crop showed very miserable results, the grain being ill-fed and poor, and the straw soft and discoloured, although the year 1842 was, in this district, very favourable for wheat, the month of August being singularly fine and warm; but when I combined the nitrate of soda with sulphate of magnesia, as in experiment No. 1 in 1843, but still more so when I combined it with the silicate of soda, as in No. 3 of that year, the straw became as strong, firm, and bright as need be desired; and this year when both these salts are combined with nitrate of soda, common salt, and gypsum, I have not only good and bright straw, but also an abundant crop of wheat.
These beds are covered by others of a peculiar soft white stone, including much gypsum, and resembling chalk, but really of a pumiceous nature. It is highly remarkable, from being composed, to at least one-tenth part of its bulk, of Infusoria: Professor Ehrenberg has already ascertained in it thirty oceanic forms.
The walls of the cave were burnished with burnt gypsum; the ceiling was covered by a thick coat of soot; and a band of yellow ochre, like wainscoting, ran along the base of the sides.
In the planting of trees at some distance apart, the tree can be protected from destruction and enabled to make a stand in the soil by using gypsum on the spot rather than the treatment of the whole surface. In this way five or ten pounds of gypsum could be used by mixing with the soil to fill a good-sized hole. Distribution of Alkali.
The use of gypsum does stimulate the growth of alfalfa and makes its product greater just as you observe in the experience of your neighbors, but the more they use up the land now the less they will have later, unless they resort to regular fertilization to restore what has been exhausted. But even that may be a good business proposition. What Gypsum Does.
Of gypsum on alkali, we should begin at the rate of one ton to the acre and repeat the application as frequently as necessary to achieve the desired result. If the alkali was quite strong we would use twice as much.
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