probably never be able to ascertain. The remarkable fact which our microscopes make known to us, that all infusions of natural substances in water will produce life, however extraordinary the form may be, seems to denote a continuation of being beyond any possible comprehension, and probably subservient to the existence of each other: the minute creature that floats a hardly perceptible atom in the water of the ditch, and which subsists many of the animals which inhabit those places, feeds upon smaller than itself, and those again, possibly, upon more minute ones which the vegetable infusions of those places give existence to: here the investigation terminates, but the thread unbroken continues, probably through endless gradations, perceptible to infinity alone. Having applauded the operations of Nature with so much cordiality, possibly I may be called her “enthusiastic adorer,” but the epithet must be disclaimed. None can respect the works of creation more, but ’tis not with an ecstasy that glows, fades, and expires, but with a calm deep- rooted conviction implanted in the boy, and increased by years of notice and experience. I have followed her footsteps, though far, very far distant, as an humble admirer of perfection, nor can my veneration cease whilst reason continues undisturbed. * * * * * Sept. 8th, 1828.—A remarkably dry and exhausting day, not from any peculiar influence of the solar heat, but from the arid state of the air, which was very distressing to our feelings, and all tender vegetation became languid and suffering under its influence. I endeavored to ascertain the power of absorption possessed by the air at the time by an experiment, rude enough to be sure, yet it tended in some measure to indicate the rapid manner in which fluids are exhaled in particular states of the atmosphere. A linen cloth twelve inches square, which had absorbed an ounce avoirdupois of water, was suspended in the shade in a free current of air, and in the course of ten minutes it had lost 436 grains, equal to one-sixteenth of its weight. This great evaporation was principally effected by the absorbent power of the air, and manifested in some degree the exhausting influence that was passing over the earth and the vegetation exposed to the current of air; and as the roots could not derive sufficient moisture from the soil to supply what was thus drawn from the leaves, the foliage became languid and flaccid in consequence. The linen, containing the same quantity of water, was then spread upon a short turf in the sun and in the space of ten minutes it lost 368 grains, and this was effected without any particular influencing current of air; accordingly, the evaporation from an acre of moist land covered with vegetation would exceed one hundred and twenty-two cwt. of water in an hour! As the quantity drawn from the vegetation on the soil may be equal to the shelter its foliage affords