Professor Marsh, in the work to which we have already several times alluded, says: "When newly cleared ground is burnt over in the United States, the ashes are hardly cold before they are covered with a crop of fire-weed, a tall herbaceous plant, very seldom growing under other circumstances, and often not to be found for a distance of many miles from the clearing." The botanical name of this plant is _Erechthites hieracifolia_, and it is well known to the botanists of New England. Its seeds are almost as destructible by fire as thistle-down itself; and it is not to be supposed that any of the seeds borne by the winds or by birds, and scattered through the clearing before it was burned, could have survived the intense heat to which they must have been subjected in the burning off of a heavy and dense growth of felled timber. The seeds, if any, must have been scattered after the fire, and not before it. But these heavy clearings--those in which we have witnessed the most abundant crops of fire-weed--are generally burnt off in the early spring, when there are no seeds to be scattered, as all those of the previous year's growth find their proper lodgment in the soil before the winter fully closes in. The seeds for which Professor Marsh would have to search, therefore, would be those _grown in some corresponding latitude, or plant zone, in the southern hemisphere_, not within thousands of miles from the clearing in which they so promptly make their appearance. Professor Marsh suggests, however, that they may have come from "the deeply buried seeds of a former vegetation, quickened into life by the heat." But had he examined these plants, in their incipient stages of growth, he would have found that they sprung directly from the surface of the burnt soil, their initial rootlets hardly extending to the depth of two-thirds of an inch below it, and where they must have utterly perished from the heat. The theory he suggests is the only possible one, he thinks, to account for the mystery, and hence its suggestion by him. But he has only to pass one of the delicate seeds of this plant through the flame of a candle to see that it instantly perishes by fire. His suggested theory must be abandoned, therefore, and that of the Bible genesis accepted in its place.