Mode of equalising Temperature. ,35 



" Mr. Busby considers his invention of general application; 

 for, besides forcing the hot water downwards, an object never 

 before accomplished, he causes so rapid a circulation in the 

 ascending and level pipes, as to be enabled to employ tubes 

 of much smaller bore than are now used. He can, besides, 

 make water ascend and descend again about doors and win- 

 dows, pass beneath floors ; and, in short, he can carry his 

 pipes in any direction whatever, without sensibly impeding 

 the circulation of the hot fluid." — C. A. B. (Bep. of Arts, 

 vol. xiv. p. 14)3.) 



We were present on the occasion of the trial alluded to, 

 and were much gratified.' The following figure {Jig. 2.), 

 taken from the Repertory of Arts, will give a general idea of 

 the apparatus, as exhibited at Mr. Eckstein's : — 



a, A common fire-grate, fixed in a 



garret over the back shop. &, The 



boiler, with the circulator within it. 



c, Smoke-jack wheel, fixed on the same 



axis with the circulator, d, Descend- 



g- ing hot-water pipe, e, Vase in Mr. 



Eckstein's shop, 21 ft. below the garret, 



which is kept full of circulating hot 



vi'ater by the descending hot-water pipe. 



J'Jl Ascending pipe, by which the water 



,«/\ is returned to the boiler, to be re- 



heated, g, The garret floor, h, The 



shop floor. 

 In heating dwelling-houses, and in cooling or heating liquors 

 in manufactories, it is evident that this most ingenious inven- 

 tion may be turned to good account. 



Art. IX. A Mode of ohtaining Uniformity of Temperature, and 

 various Modes of Engrafting. By Charles M. W . 



Sir, 



I AM not aware that the following method of obtaining 



uniformity of temperature has been tried. I placed a small 



3 pot with a cutting from a delicate fairy rose in a 



larger pot [fig. 3. a), containing charcoal, with a 



double glass over it {b), so as to leave a stratum 



of air between the glasses. Although it was tried 



late in the season, and placed in a green-house 



without any artificial heat, yet it succeeded. The 



object in view was, to surround the pot by a non- 



D 4 



