50 



THE FLORAL WORLD AND GARDEN GUIDE. 



some more certain and cleaner source of 

 heat. Mr. Hibberd first tried Palmer's 

 No. 6 night-light, which burns twelve 

 hours, and found that to answer admir- 

 ably ; but as this required to be burned in 

 a tall lamp, its use was inconvenient. 

 Nevertheless, it may be made a note of, 

 that this kind of candle serves the purpose 

 well. 



Trials wore also marie of Palmer's 

 minimum candles, burning nine hours, 

 which, at the utmost, gave only 60" of 

 beat, and on an average only 50' during 

 mild weather; and these were discarded as 

 too weak for the purpose, though for strik- 

 ing such things as Cerastium tomentosum, 

 and other hardy plants, and forwarding 

 seeds requiring only a very moderate tem- 

 perature free from fluctuations, these are 



turer of the Waltonian cases. Thus, the 

 only objection that could be raised against 

 the use of Waltonian cases was brought 

 to an end, and, as now constructed, the 

 amateur may leave home without anxiety 

 as to the progress of his seeds and cut- 

 tings ; he has but to give directions that 

 at such an hour a fresh candle is to be 

 lighted, and the most unintelligent domes- 

 tic can keep the machine in action until 

 his return. 



In the diagrams which illustrate this 

 article, Fig, 1 is a view of the apparatus 

 as it appears when in use. Its dimensions 

 are as follows : — Prom end to end inside, 

 31 inches ; from front to back inside, 17 

 inches ; superficial area, 568 square inches. 

 Height inside at front, 10 inches ; at back, 

 13s- inches. The bottom of the frame cx- 



also useful. Messrs. Price and Co. then 

 made some ship candles of various degrees 

 of heating power, and among twelve dif- 

 ferent kinds, Mr. Hibberd pronounced 

 three of them to be eminently suitable, 

 giving a heat of 80% and continuing to 

 burn twelve hours. There was still one 

 difficulty to be surmounted, and that was 

 to get the supply of heat at a moderate 

 price, for the last-named candles could not 

 have been sold at less than half-a-crown 

 per dozen, which would have made the 

 working of a case cost almost as much as 

 the plants would be worth. Mr. Wilson, 

 the manager of the company, then pre- 

 pared a large form of the candle known as 

 Sherwood's, and these are now to be had 

 from the company, or from Mr. West, of 

 Surbiton, Middlesex, who is the manufac- 



ternally is 7 inches from the ground, and 

 its appearance is particularly neat and 

 compact. As originally made, there was 

 a tin box suspended in the front for an 

 oil lamp. That is now superseded by a 

 box with a bottom of perforated zinc, and 

 a sliding glass in front. In this box is 

 placed, for heating purposes, the candle, 

 made in the fashion of a Child's night-light, 

 but with more substance for continuous 

 burning and supply of heat. The per- 

 forated zinc admits air to keep the candle 

 burning ; the glass enables the cultivator to 

 see if the candle is burning properly. To 

 set the case to work, the top lights are 

 lifted up ; an inch depth of silver-sand is 

 laid down and wetted ; the boiler is filled 

 by pouring water into it through a tube 

 in the centre, and the candle is lighted. 



