Proceedings of the Royal Society. 103 



February 27. 



On the question as to the evolution of heat during the coagulation of 

 blood, by Dr. Charles Scudamore. 



On the double organs of generation of the lamprey, the conger eel, 

 the common eel, and the barnacle, which impregnate themselves ; and 

 of the earth-worms, the individuals of which tribe mutually impregnate 

 one another. By Sir Everard Home, Bart. 



Art. XV. Proceedings of the Horticultural Society . 



Tuesday, January 7, 1823. 

 A Paper by the President, on the flat peach of China, was read. It 

 contains some curious particulars as to the habits of this very remark- 

 able plant, which was imported by the Society from China in 1820. 

 It appears to possess a degree of excitability exceeding any that can be 

 given, even temporarily, to any other variety of [peach. In 1S21, its 

 blossoms unfolded in January in a peach-house, the lights of which 

 were all off, and the fruit set freely, with the protection of a mat only. 

 Last year it blossomed in November, before the lights of the house 

 were put on ; and on the 3d of January, when the paper was written, 

 the peaches were as large as peas, with no more heat than would just 

 exclude the frost. Wiat is very remarkable in this plant is, that it 

 retains its old leaves in full vigour untU after the new are put forth. . 

 Several collections of pears and apples were exhibited; among the 



vegetables shown, were remarkably fine specimens of an early variety 



of rhubarb, grown by Mr- William Buck, in the garden of the Hon. 



GrevUle Howard, at Elford near Lichfield. It is of a beautiful pink 



colour, which it retains when cooked. 



Tuesday, January 21. 

 A paper by James Robert Gowen, Esq., was read, descriptive of 

 a new beautiful hybrid amaryUis. raised by William Grifrin, E«q.. and 

 which had flowered in the stove at Highclere. 



A paper by David PoweU, Esq., was read, coimnunicated by Charles 

 Holford, Esq., on an easy method of securing the scion to the stock in 

 grafting. 



Two papers, on the cultivation of the mushroom, were read, one by 



