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discovered; yet it does not, I think, appear, that we can make any better or greater use of water since the discovery, than we did before it.

We can never think of the elements without reflecting upon the number of distinct uses which are consolidated in the fame substance. The air supplies the lungs, supports fire, conveys found, reflects light, diffuses smells, gives rain, wafts ships, bears up birds. E£ JsTaTos Ta 7rai'Ta: water, beside maintaining its own inhabitants, is the univerfal nourisher of plants, and through them of terrestrial animals; is the basis of their juices and fluids: dilutes their food, quenches their thirst, floats their burthens. Fire warms, dissolves, enlightens; is the great promoter of vegetation and life, if not necessary to the support of both.

We might enlarge, to almost any length we pleased, upon each of these uses ; but it appears to me almost sufficient to state them. The few remarks, which I judge it necessary to add, are as follow.

I. Air^s essentially different from earth. There appears to be no necessity for an atmosphere's investing our globe ; (the moon has

none:) none:) yet it does invest it ; and we see how many, how various, and how important are the purposes which it answers to every order of animated, not to fay of organized, beings, which are placed upon the terrestrial surface. I think that every one of these uses will be understood upon the first mention of them, except it be that of reflecting light, which may be explained thus. If I had the power of feeing only by means of rays coming directly from the fun, whenever I turned my back upon the luminary, I should find myself in darkness. If I had the power of seeing by reflected light, yet by means only of light reflected from solid masses, these masses would shine, indeed, and glisten, but it would be in the dark. The hemisphere, the sky, the world, could only be illuminated, as it is illuminated, by the light of the fun being from all sides, and in every direction, reflected to the eye, by particles, as numerous, as thickly scattered, and as widely diffused, as are those of the air.

Another general quality of the atmosphere is, the power of evaporating fluids. The adjustment of this quality to our use, is seen in its action upon the sea, In the sea, water and salt are mixed together moll: intimately yet ^.i.-3 the the atmosphere raises the water, and leaves the salt. Pure and fresh as drops of rain descend, they are collected from brine. If evaporation be solution, ( which seems to be probable,) then the air dissolves the water and not the falt. Upon whatever it be founded, the distinction is critical; so: much so, that, when we attempt to imitate the process by art, we must regulate our distillation with great care and nicety, or, together: with the water, we get the bitterness, or, at least, the distasteful ness of the marine substance: and, after all, it is owing to this original elective power in the air, that we can effect the separation which we wish, by any art or means whatever.

By evaporation water is carried up into the air; by the converse of evaporation it falls down upon the earth. And how does it fall? Not by the clouds being all at once reconverted into water, and descending, like a sheet; not in rustling down in columns from a spout; but in moderate drops, as from a cullender. Our watering-pots are made to imitate showers of rain. Yet, a priori, I should have thought either of the two former methods more likely to have taken place than the last.

By respiration, flame, putrefaction, air is rendered unfit for the support of animal life. By the constant operation of these corrupting principles, the whole atmosphere, if there were no restoring causes, would come at length to be deprived of its necessary degree of purity. Some of these causes seem to have been dis-. covered; and their efficacy ascertained by experiment. And so far as the discovery has proceeded, it opens to us a beautiful and a wonderful œconomy. Vegetation proves to be one of them. A sprig of mint, corked up with a small portion of foul air placed in the light, renders it again capable of supporting life or flame. Here therefore is a constant circulation of benefits maintained between the two great provinces of organized nature. The plant purifies, what the animal had poisoned: m return, the contaminated air is more than ordinarily nutritious to' the plant. Agitation with water turns out to be another of these restoratives. The foulest air, shaken in a bottle with water for a sufficient length of time, recovers a great degree of its purity. Here then again, allowing for the scale upon which nature works, we fee the falutary effects of storms and tempests. The yesty waves, which

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confound the heaven and the sea, are doing the Very thing which is done in the bottle. Nothing can be of greater importance to the living creation, than the falubrity of their atmosphere. It ought to reconcile us therefore to these agitations of the elements, of which we sometimes deplore the consequences, to know, that they tend powerfully to restore to the air that purity, which so many causes are constantly impairing.

H. In Water, what ought not a little to be admired, are those negative qualities which constitute its purity. Had it been vinous, or oleaginous, or acid; had the sea been filled, or the rivers flowed, with wine or milk; fish, constituted as they are, must have died; plants, constituted as they are, would have withered; the lives of animals, which feed upon plants, must have perished. Its very itifipidity, which is one of those negative qualities, renders it the best of all menstrua. Having no taste of its own, it becomes the sincere vehicle of every other. Had there been a taste in water, be it what it might, it would have inspected every thing we ate or drank, with an importunate repetition of the fame flavor.

Another thing in this element, not less to 2 D 2 be

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