Transactions of the Horticultural Society, 139 



more air is given to the house, and no fire-heat is maintained 

 during the day ; but if the weather is dark or wet, a httle fire 

 is applied at night ; if the weather is warm and dry, the house 

 is exposed to the air all night without fire-heat. By this ma- 

 nagement, the peaches acquire the unusual weight of half a pound 

 each, and occasionally even that of ten ounces. The trees 

 submitted to this treatment have undergone the same process 

 for twenty-seven successive years, and are still in good health. 



XXV. Remarks upon the Comparative Advantages of Grafting Pears 



upon Quince Stocks. By Mr. Thomas Torbron. 



It is a well known law in vegetable physiology, that in propor^ 

 tion as leaf-buds, or as Darwin called them, viviparous buds, 

 are produced by plants, flowers, or oviparous buds, cease to be 

 developed, and vice versa. Hence it is obvious, that whatever 

 has a tendency to check the former, and favour the produc- 

 tion of the latter, is beneficial to gardeners. Practice has shown 

 that, by grafting fruit trees upon one kind of stock, the ten- 

 dency to produce leaf-buds is increased, and that other stocks 

 exercise a contrary influence. Gardeners in this country have 

 long been well aware how to apply these facts to the cultivation 

 of the apple, but they are little acquainted with the influence 

 of the stock upon other kinds of fruits. The object of the 

 writer of this paper is to show the benefit of grafting pears upon 

 the quince-stock, instead of upon their own species. He states 

 that the increase of produce by that means is on the average 

 as 7.6 to 1 in favour of the quince ; and in one case he found 

 it as 15.1 to 1. Pears grafted upon the quince have also the 

 merit of not occupying so much space as others ; but it is to be 

 doubted whether they be as long lived. 



XXVI. Description, with Plans, of a Hot-wall. By Mr. John Hay. 



Without the aid of heated walls, our friends in the North would 

 have little chance of raising many of the good things in their 

 gardens, which are produced with us by the climate alone. To 

 them, we doubt not, these plans will be highly useful. They 

 cannot well be explained without figures ; we must, therefore, 

 refer such of our readers as are interested in the matter, to the 

 work itself. 



XXVII. Report upon the New or Rare Plants which flowered in the 

 Garden of the Horticultural Society at Chiswick, between March, 

 1825, and March, 1826. Part II. 



This is a continuation of former reports of the same nature. 

 The present paper comprehends twenty-seven species, with 



