The application of pure cultures of bacteria for improving the fertility of the land is still in an experimental stage.
Experiments show that pure cultures, when mixed with garden soil constantly moistened short of saturation and kept in the dark at a temperature of 14° C., will retain their vitality for more than ten months; from moist soil kept at 26° C. they die out in about two months; from moist soil at 30° C. in seventeen days; and in dry soil at the same temperature within a week.
Just as ancient cultures used creation myths to explain their beginnings, we have stories of the "American Experience" that we tell again and again until they acquire mythic status.
Pure Cultivation of Yeasts.-The methods which were first adopted by Hansen for obtaining pure cultures of yeast were similar in principle to one devised by J.
Industrial Plants.s T he manufacture of sugar from beetroot, owing to the increased~use of sugar, became highly important during Cultures -industriellesUnder this head the French group beetroot, hemp, flax and other plants, the products of which pass through some process of manufacture before they reach the consu mer.