The "waste steam" lost to useful purposes may be said to be beyond calculation. Well-regulated bottom-heat having been shown to be of immense importance in gardening, it is surprising that more attention should not be paid to economizing the waste water and steam of engines, where factories are conveniently situated. What may be done without cost by attention to this is shown by an experiment tried by Mr. Dillwyn Llewellyn, of Wales. From a small eight-inch cylinder engine, employed by him for agricultural purposes, this gentleman conducted a jet of steam for twenty minutes daily, through an inch iron pipe, into a bed of rough stones, covered by a glazed frame; a journal of the temperature was kept, from which it appeared, first, that although steam was introduced among the stones for only twenty minutes a day, the thermometer was raised from 51° to 68° in the first 24 hours; second, that the temperature continued to rise for many hours after the second application of steam, until the thermometer reached 108°; third, that at the end of 19 hours the heat of the frame diminished; yet, fourth, that at the end of seventy hours the temperature still was 69°. This is a conclusive answer to those who think that masses of heated water, or heated porous materials, like rough stones, will become so reduced in temperature by a few hours' withdrawal of the prime heating power, as to endanger the plants cultivated in houses thus warmed.

The experiment continued to be successful, and enabled pine-apples of the most perfect quality to ripen. A hint might be taken by many manufacturers, to grow grapes and other fruits by the aid of what is now carelessly thrown away.

John W. Degrauw, Esq.'s annual address before the spirited Brooklyn Horticultural Society has been printed in a neat pamphlet. It contains much matter of interest and for thought. Such beautiful places as he describes in the vicinity of Brooklyn almost tempt us to leave our easy-chair.

The Rev. L. Billings's Address before the Adams County Agricultural Society, Illinois, comes to our table in neat and unpretending form, but is full of good thoughts well ex • pressed. The report of the second annual fair, and the premiums, mark a most progressive spirit, for which we are disposed to give Illinois a full meed of credit.

Waste Steam #1

Mr. Editor: I was very glad to see your notice, in a late number, respecting waste steam. How many steam-engines we have in Philadelphia (some estimate them as high as six hundred, within the limits of the pavements), which are continually throwing away, into the air, an amount of heat and moisture sufficient to supply luxuries to the whole population. By depositing this heat in beds of stone, etc, for night warmth, every owner of a steam engine might grow his own grapes, pine-apples, etc. Even suppose he had his grapery in the garret of his factory! A few windows in the roof, easily constructed, would give sun and light, and the steam, under control of a valve, could be injected with perfect ease, without costing an additional copper. It might, too, be led by small, inexpensive pipes, to considerable distances, instead of being jetted out into the blue vault of the sky. Some wiseacre has suggested, that by going to the coal mines with plenty of sashes, we could grow grapes, and other forced fruits, with comparatively no expense of fuel. Why not grow them where they are to be sold, close to a market, by using this waste matter, within the reach of everybody who has steam-works near him? The suggestion is most important.

I am now treating for the waste steam of a neighbor, to be brought under ground 800 feet.

Philadblphus.