382 



JOUBNAL OF HORTICULTUIIE Ai!D COITAGE GAKDJENEK.. 



r uuj as, isas. 



HEATING BY GAS. 



Dttrino a eonvcrpation relative to the motles of heating ap- 

 phcable to garden Ptructures, one of the Editors of this Journal 

 stated as liis opinion that " there is no mode either more 

 effective or attended by so Bmnll an amonnt of trouble as heating 

 by gas." He qualified his opinion afterwards by reminding his 

 auditors that ho was talking to amateurs who managed their 

 own small greenhouses and conservatories. He was asked to 

 famish a plan, and he endeavoured to escape by referring to tho 

 back volumes of this .Journal. That, however, was not con- 

 sidered satisfactory, and eventually he promised that, if he 

 thought it would be useful, he woulil gather together the state- 

 ments and illustrations scattered through the volumes to v.hich 

 lie had referred. 



For the use of new snhscribers lie had arrived at an aflFirma- 

 tive conclusion, when a letter from a correspondent, ".]. F., 

 Northampton," inquiring how he could best exclude frost from 

 a small conser\-atory, now erecting, promjiled to the speedy 

 publication of what follows. 



The simplest mode is using a gas stove. We have employed 

 such a stove, merely to exclude frost from a greenhouse, and 

 it answered very well. It was a small circular stove, with one 

 Argand burner, and an iron tube instead of glass round tho 

 burner. An iron chimnej' carried tff all the noxious gases. 



A modification of this is the following: — 



(£ •»■ ' 



"V^^ 



Kig. 1. 



This apparatus (firj. 1), consists of a burner, a — a ring of 

 brass tube — 5* inches in diameter, pierced with lifteen fraall 

 holes, placed 4 inches above the level of the floor. Over the 

 burner is what may be described as an inverted galvanised iron 

 trough, 9 inches wide, 7 inches deep, and 5 feet long, resting on 

 four legs 4 inches high. The buiner is placed under one ex- 

 tremity of this trough ; from the other end runs the chimney, 

 which is of three-inch galvanised iron piping, the joints of whicli 

 are not cemented. This rises H feet, and is then carried across 

 the house 12 feet, andtinallymakesitsexit in the kitchen chim- 

 ney. It must either be carried into a chimney, or, if this is 

 not possible, it should, after being carried across the house, 

 rise .5 or G feet perpendicularly. Placed on tho top of the 

 trough over the burner is an evaporating-pau, 6, containing 

 ahont three gallons. 



This arrangement, if not ornamental, is cheap and useful, 

 and, with a little expense, may be made more elegant ; at any 

 rate, it is entirely removed during the season when the more 

 attractive flowers of summer invite visitors. 



Xho house is a lean-to, 14 feet square, and 13 feet high at 

 the back. 



If hot water ia employed to diffuse the heat, then the amateur 

 has the following modes to select from. The laudations of 

 each arc the inventors', not ours. 



The greatest advantages the following mode {fiflfs. 2 and 3), 

 offers are the facts that it requires no pxpensive brick fixing, 

 that it can easily he moved and adapted to another green- 

 house in case of removal ; it is clean, can be set in action in 

 % moment, and is easily regulated even by a lady, and, where 



there is gas, may be kept Jor any time at a comparatiTcly 

 small cost, when the great expense and trouble of the old mode 

 is considered. There is no risk with gas of losing your plants 

 in consequence of the fires going out, and no time lost in at- 

 tending to them. 



Fiij. 2 is a sectional view of an apparatus in a cellar, from 

 which the pipes are led to the greenhouse. A Is the boiler, 

 composed of two galvanised iron bowls, which may be bought 



Kg. 2. 



Fi{7. 2. Sectional Yjcw. 



Fig. 3. Innvr tube, kept in centre by stay^. 



for Is. CJ, each, and which are soldered together an inch apart 

 by means of a circular ring of No. 11 zinc, n Is a flow-pipe, 

 with G, a small tube (an inch clear), running through a good 

 part of its length, and communicating as a chimney with the 

 hot-air chamber f. c, Itctum pipe, galvanised iron, 3 inches 

 in diameter, and connected to boiler, e, ting-burner to be 

 bought for l.s. 3(7. n, Circular tube of sheet iron, same size 

 as outer edge of boiler, and made to take away. There must 

 be a small swing-door for lighting gas. i Are holes at bottom 

 for the admission of air. j, Stay from one pipe to another. 

 K, Union joints. These union joints can be in any part of the 

 return-pipe, but can only he beyond the chimney on the flow- 

 pipe. j\s a matter of course, the farther this inner tube 

 goes through the flow-pipe, the greater afterwards is the faci- 

 lity for he&ting rapidly. For some time after heating there 

 can be no heat felt issuing from the tube o, pro-s-ing that the 

 cold water is abstracting all the heat. AMien the water be- 

 comes heated then the warm air escapes ; but, by lowering the 

 burner, and a little attention at first to test its capacity, the 

 loss of heat can be brought very low. 



Fig. 3 is a section of the flow-pipe, showing how the inch 

 tube is retained by stays in its place within it. 



One advantage, and it is especially an advantage in a small 

 structure, arises from the whole of a gas-heating apparatus 

 being removable when no longer required. If there is a tap 

 close to the wall on the gas supply-pipe, and the pipe attached 

 to the gas-burner is connected with that tap by a galvanised 

 indian-rubber joint, then the tap may turn oil the .supply of 

 gas, and the stove, boiler, io., be disconnected from it and re- 

 moved at any time. 



A correspondent states that for the last three years he has 



