M 



JOURNAL OF HORTICULTURE AND COTTAGE GARDENER. 



[ February 3, 1670. 



was under an impression that had bee n done for some t ime. 

 Well, then, is it the system of ground vineries M think Mr. 

 Rivers will have something to Bay on that point. Is it the 

 avntem of running glass in earthenware grooves ! ±his, as 1 

 Minted on is also patented by Mr. Looker! The only 

 5os° ble da dm for a patent Mr. Rendle has is for adapting 

 moveable terra cotta or earthenware tiles, with glass sliding » 



*IT&3 {ffiSS.' SfflSta* on the ground of his 

 having made and exhibited models in wood; he might just as 

 well What people would infringe his patent if they drew 

 oT mans on paper. These are not the days of monopolies, 

 and what he sV* about the Court of Chancery is either from 

 sheerignoranco or for the sake of bluster and intimidation. I 

 will giv°e nim the benefit of the doubt. The granting °! patents 

 was new intended to check private enterprise or skill, but 

 merely as a protection to prevent other persons thriving on 

 Z resets of another man's taain, and if I made tiles for sale 

 similar o hie then Mr. Rendle would have a just cause for 

 Saint As it is, he has none, as I, as well as others have 

 aTer hot right to differ from him, and prefer wood and glass to 

 tiles as being cheaper and more easily moved, and because 

 wood i" a better nonconductor of heat *^«»^«». 



Mr. Rendle is perfectly mistaken if he thinks his letter will 

 in any way intimidate me, or prevent me from making the 

 small tames I intended ; nor do I mean to answer any more 

 letters on the subject.- C. P. Peach. 



[We decline inserting any more communications on the 

 subject.— Eds.] __ 



BOILERS AND BOILING. 



As Mr. Peach does not mean to write more on this subject, 

 1 shall not make any unnecessary remarks on his paper; I 

 must however, just touch on these parts of it that refer to my 

 femer artfote I am sorry bethinks I have advocated my views 

 too strong? '.and if I lave said anything offensive to him I 

 apologise but I do not recollect saying anything calculated to 

 offend 3 . i should be exceedingly grieved if I were to a tempt to 

 Xce anvone in an invidious position, more especially if that 

 Jersonw'ere a clergyman, for I am old-fashioned enough to 

 have a great respect for ministers of religion. 



I never saw a fire or heat allowed to act on water through a 

 medium of air or steam ; the boiler containing water in such 

 Tse would become unduly heated, and either explode at once, 



°Tdfd n n£ say rn th°e U motion of water in a small pipe is as free 

 bom friction as in a large one, but that as the resistance in- 

 creases equally with the power, the actual working effect is the 



TaJ no P t P thin°k tafpipes are so suitable to a horticultural 

 building as large ones, and I cannot think it requires more 

 fuel to live off a certain amount of heat through a small pipe 

 than it does through a large one, simply because I can see no 

 reason for it, but the contrary. u -»t.- 1* 



I did not speak of cold indefinitely, but said it was bettei to 

 provide sufficient pipes to warm cold air entering in unusual 

 quantities ; for, of course, as the hot air escapes cold air from 

 the atmosphere will supply its place. 



I see I guessed very nearly right when I estimated that Mr. 

 Peach's boiler contained about 8 feet of effective heating sur- 

 face. It contains 6 feet of surface in contact with Jie fare, 

 and 45 feet of flue surface (not counting the top j this divided 

 bv 3 gives rather more than It feet to be added to the b feet 

 of internal surface, so the boiler contains 7J feet of surface, 

 without counting the surface presented by the ends. 1 sup- 

 pose this surface will amount to over 3 feet, thus making 

 a total of 101 feet. If the boiler were perfectly set it might 

 heat 600 feet of pipe; this would be the maximum effect : 

 consequently I do not see any proof of this boiler boiling any 

 water by means of top heat. ... 



In conclusion, I maintain that the circulation of water is 

 brought about by convection, and that it is also entirely kept 

 up by convection.— John Woouield, Smethirick. 



GLADIOLUSES FOR POT CULTURE. 

 In accordance with the wishes of some of your correspon- 

 dents I will enumerate a few cheap varieties of Gladiolus suit- 

 able for pot culture— Apollon, Bernard Falisey, Brenchleyensis, 

 Ceres, Chateaubriand. Comte3«e de Bresson, Daphne, Dr. 



Andrv Endvmion, Fanny Rouget, Goliath. Lord Granville, 

 Haquin, M. Vinchon. Napoleon, Ophir, Penelope, Prince Im- 

 perial, Rebecca, and Vesta. 



For the benefit of anyone who may be possessed of a lew 

 bulbs that may be spared for potting purposes, I may mention 

 that most of the race give the greatest satisfaction under glass. 

 — A. Keek. 



RESULTS FROM CROSS-FERTILISING PEAS. 



The following communication from Mr. Laxton was re^.?* 

 the last meeting of the Royal Horticultural Society's Scientific 

 Committee. 



The seeds exhibited were derived from a single experiment. Amongst 

 these seeds will be observed some of several remarkable colours, ln- 

 i d, Un4t ek, violet, purple-, treated and spotted, maple grey, greenish, 

 S and almost every intermediate tint, the vaned colours being 

 wxrentl y produced on the outer coat or envelope of the cotyledons 

 ony TheVas were selected for their colours, &c. from he thrrd 

 year's sowing, in 1869, of the produce of a crop in 18fet> of the early 

 roSnd wh c° ceded ami white-fiowered garden variety. Ringleader, 

 which UabtuTlj feet in height, fertilised by the pollen of the common 

 punde flowered Maple Pea, which is taller than Ringleader, and has 

 SX indited sLds. I effected impregnation ^ '~f * B 

 anthers of the seed-bearer, and applying the pollena£ an an ly stage. 



Krta few were round. Some of the plants ripened off earlier than the 

 Marie which in comparison with Ringleader, is a late variety; and 

 »l»h„n'nb the pods were in many instances partially abortive, the 

 proTce .was v 'rylar'e. In 1MB I sowed the Peas of the preceding 

 y a" sgr"and selected various plants for earliness, produc rveness 

 &c Some of the plants had light-coloured stems and leaves these 

 all -bowed white flowers, and produced round white seeds, others had 

 , an deflowers showed the purple on the stems and at he axils of tie 

 Kles and produced seeds with maple, grey, purple-streaked, or 

 33 "da few only, again, with violet-colonred envelopes. Some 

 7 t heLTswl, round, and some partially indented. The pods on 



thme one wuii avion l ,w re e in the produce of the maple- 



plints were again a few pods with Peas dineimg entirely ™» 

 ™fpeaV behi» of intermediate character, appeared to vary most. 



^ n Vfl„wer fo, al'thon-h i» sorTflowers I thought I found the 



5S33£a5Ss33£Saste 



