Page:Popular Science Monthly Volume 38.djvu/512

496 Fig. 1) show extremely limited growth." The plants in pots 2 and 3, inoculated with a soil-extract containing microbes, began to show enhanced growth, when compared with the plants in pot 1, before the end of July. Finally, the plants in pot 1 were eight inches and a quarter, and eight inches and a half high; in pot 2, fourteen, and fifty inches and a half; in pot 3, fifty-two inches and a half, and fifty inches and a half; while in the garden soil, in pot



4, they made a somewhat less extended growth than those in pots 2 and 3 in a sterile sand inoculated with soil-microbes. It should be remarked, however, that "the plants in pot 4 were more vigorous, and, while they flowered and seeded, neither of those in pots 2 or 3 did so."

A photograph of the vetches was taken October 25th (a copy of which is given in Fig. 2), and they were harvested for examination the following day. The plants in pot 9, which was not inoculated with soil microbes, were eleven inches and a quarter, and ten inches and a half high; those in pot 10, in a sterile but