. Pharmaceutical bacteriology, with special reference to disinfection and sterilization. Bacteriology. 96 PHARMACEUTICAL BACTERIOLOGY. a few others. Of these, Khizohium mutabile, the root-nodule bacterium of the Leguminosae, has received most attention. The first to suggest a plan for practically utilizing the root nodule bacteria (Rhizobia) and to secure letters patent for the process in Germany and the United States, were Nobbe and Hiltner, of Tharand, Germany. Patent No. 570,876 was granted Nobbe and Hiltner in the United States, November 3, 1896. This patented fertilizer for leguminous pla
. Pharmaceutical bacteriology, with special reference to disinfection and sterilization. Bacteriology. 96 PHARMACEUTICAL BACTERIOLOGY. a few others. Of these, Khizohium mutabile, the root-nodule bacterium of the Leguminosae, has received most attention. The first to suggest a plan for practically utilizing the root nodule bacteria (Rhizobia) and to secure letters patent for the process in Germany and the United States, were Nobbe and Hiltner, of Tharand, Germany. Patent No. 570,876 was granted Nobbe and Hiltner in the United States, November 3, 1896. This patented fertilizer for leguminous plants consisted of pure cultures of the several varieties (or perhaps species) of R. mutabile, each spe- cies of plant, as bean, pea, clover, alfalfa, etc., having the cultures derived from the root nodules peculiar to Fig. 45.—Root nodules of sweet clover, somewhat magnified. A, rootlets with nodules, a, single nodules, b, clusters of nodules. These are sometimes very large, consisting of hundreds of nodules, loosely united. B, diagram of single nodule, a, un- infected area, b, infected area. This commercial preparation was given the name "nitragin," and its efficiency was quite carefully and extensively tested and commented upon by European and American investigators. The consensus of opinion seems to be that it was of doubtful practical utility for agricultural purposes. Some authorities maintained that it was of unquestionable value in virgin soil. In rich and otherwise favorable soil conditions it is of only slight value. It is maintained that nitragin aids very materially in developing and ripening the fruit. As becomes evident from careful consideration, the value of this microbic fertilizer depends upon whether or not it will cause an increased development in the number and size of root tubercles over and above those which would develop without the presence of this artificial aid. If the soil. Please note that these images are extracted from scanned page
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