250 Mr. Hogg''s new method, ^c. 



A number of the above boilers and tubes have been erected, 

 under the superintendence of Mr. Hogg, in the neighborhood of 

 New York, in the conservatories and green-houses of different 

 gentlemen, where, as we learn, they have proved highly satis- 

 factory. Yours, 



JVewburgh, JV*. Y. June 6, 1836. A. J. Downing. 



The apparatus for heating green-houses, as described above 

 by our valued correspondent, appears to us to combine many 

 advantages for ordinary forcing-houses, green-houses, graperies, 

 &c., and we are happy in thus early laying before our readers 

 this new invention. One great objection to the erection of 

 green-houses, and similar structures, for the protection of plants 

 during our severe winters, is, the expense attendant upon heat- 

 ing them. Nothing can surpass the system of heating by hot 

 water ; yet the first cost of the erection of the apparatus which 

 is required by the common method is so great, that many are in- 

 duced to continue the old smoke flues, and others are forced to 

 forego the pleasure to be derived, in our dreary winters, from 

 the green-house. Every new invention or discovery which will 

 in any way lessen the expense of warming such structures, will 

 tend to cause their erection, and thus create, by the spread of a 

 taste and a desire for plants, a demand for the products of the 

 nurseryman. 



In this wonderful age of improvements, all new inventions, 

 unless they are such as have cost the inventor years of labor and 

 perseverance to bring them to perfection, should be pubhc prop- 

 erty. The patent law, in some cases, may be of considerable 

 benefit to projectors of improvements, but so common have the 

 applications become for such protection as it was intended to 

 afford for inventions, that it consists now in but little more than 

 the name. If the system of heating by hot water, as invented 

 by Mr. Hogg, junior, is of such real utihty as it appears to be, 

 to horticulturahsts and florists, it would certainly be the most ju- 

 dicious course to pursue, to bring it extensively into notice, 

 and, by cheapening the cost of erection as much as possible, 

 induce amateurs and lovers of gardening to build green-houses, 

 graperies, &c. We do most sincerely hope that Mr. Hogg will 

 give up the intention, if he has ever had any, of patenting his 

 invention. As a nurseryman, we should never think of his doing 

 so ; and we have too high an opinion of his good judgment to 

 believe he will. This improvement, however so great, cannot 

 certainly be believed, in this age, to be the ultimatum of heating 

 green-houses by hot water ; and there may yet be discovered 

 other and better modes. We should wish Mr. Hogg to reap 

 some benefit for his discovery ; and we have not the least doubt 

 but the increase of floricultural taste, which will in a greater or 



