I suppose Mr. Fowler's remarks about my mode of heating call for some explanation. The way of heating in the May number of Gardeners' Monthly is simply a modification of Parkinson's high pressure hot water system, which I operated for a long time, some thirty years ago, in a large range of houses in Thoune (Switzerland), and very successfully, too, the only objection' being the high rate of pressure used, which might render it liable to accident. Still, I have not, to this time, heard of any.

On my principle I use less pipes, of larger size and lower pressure, combining also the advantages of both this and the common ways. As I said before, I do not claim any priority. As my business is to use heating apparatus, and not to sell them, I do not wish to engage in any further controversy.

[Mr. Zirngiebel is one of the largest plant growers in New England, and at the same time one of the most intelligent horticulturists in the United States, and his views on the hot water and steam questions as given in our magazine attracted wide attention. Steam heating is a great success in many instances. It is much cheaper than hot water under many circumstances. But there is as great room for hot water improvement as for steam improvement, and we quite agree with Mr. Zirngiebel that, granting very much in favor of steam, the days of hot water are yet to be very long in the land. - Ed. G. M].

Mr. Zirngiebel sends the enclosed note in fuller explanation of the methods of hot water heating he uses: " My principle of heating by water under compression is a modification of Perkins' system, using less pipes, of larger size, and very low pressure, obviating also the defects of the original plan, which I have been well acquainted with, having had it under my care for several years in Europe, and having had the best opportunity of testing its advantages and defects. In my opinion it is the heating of the future".