258 DECEASE OP THE HON. WILLIAM HERBERT. 



will be needed to raise air from 20^ to 200^, over an interval of 180^, 

 sliovving an apparent loss of one-eighth to tiie ventilating system as 

 compared witii thePolmaise. But this loss is partly compensated by the 

 smoke yielding up more of its caloric to the contact with the colder 

 current, and, therefore, it is only fair to compute that one-sixteenth of 

 the fuel is employed to procure the advantages of thorough ventilation. 

 I mean next to prove that the principle upon which my stove is con- 

 structed derives twice as much heat from the combustion of the same 

 quantity of fuel as do any of the ordinary arrangements. Mr. Meek 

 gives well-merited praise to Dr. Arnott ; I would gladly add my 

 tribute, could I by so doing add honour to such a name. I am satis- 

 fied that this method of consuming fuel is incomparably superior to 

 any other, upon which account I employ it in my stove. There is, 

 however, a great loss of heat in the discarded smoke, even from an 

 Arnott stove, and I suppose few of your readers will be prepared for 

 the result of my experiment upon one. It stood in a room sixteen feet 

 by fourteen feet ; instead of allowing the smoke to escape directly into 

 a chimney, it was carried through the wall into a seriea of pipes in the 

 next, which was a large room ; after traversing these pipes, it Avas dis- 

 charged into the chimney. The waste smoke giving off its heat over 

 the large surface of the pipes, raised this latter rooui to a temperature 

 exceeding that containing the stove by 12^ ; I have therefore added to 

 the advantages of Dr. Arnott's combustion a more economical appli- 

 'cation of the products, from which I abstract more than double the 

 'heat generally made subservient to the purposes of warming. I can, 

 therefore, well afford to spare one-sixteenth for ventilation, of which 

 also, I am happy to say, that Dr. Arnott is a distinguished and able 

 advocate. I cannot conclude without protesting against any insinuation 

 that my system has been ' accompanied by such practical difficulties as 

 preclude its general employment.' I positively assert that in no one 

 instance has this been the case ; and it is only because I have been too 

 fully occupied with my business here that I have not before corrected 

 Mr. Meek's reiterated statements respecting the economy of the 

 Polmaise return-air drains. Robert Hazard." 



( To be co)ili?med,) 



DECEASE OF THE HON. WILLIAM HERBERT, 

 DEAN OF MANCHESTER. 



The ardent zeal and unwearied perseverance of the above-named 

 gentleman in his enthusiastic practical pursuits, and devotion of his 

 superior talents to promote the interest of gardening in general, and 

 floriculture in particular, for the last thirty years, many of our readers 

 are acquainted with. Many excellent remarks and contributions from 

 his pen have been inserted in our Magazine, particularly upon his 

 favourite tribes of plants, the Amaryllidasa, Iridsea, &c. By his much 

 lamented death the gardening community have sustained a considerable 

 loss, and which in some respects is irreparable. 



Dr. Lindley observes, in the Gardeners' Chronicle, — " We well 



