324 
read his. paper here. I made guns in March, 1855; he talked of them in 
June of the same year. 
FURTHER REMARKS BY DR. HART. 
A question of priority having arisen, and Captain Blakely having re- 
ferred to a letter of Dr. Hart to him, in which he mentioned 1855 as the 
date of his investigations, Dr. Hart replied, that he had not intended to 
raise any question of priority ; that in the letter referred to, he had said 
that he believed his investigations and Captain Blakely’s had been simul- 
taneous, as they were certainly independent, and that he had preserved 
no record of dates; but that Mr. Mallet, being in possession of the original 
letters which contained his calculations, could supply them if they were 
considered important. The fact was, that Captain Blakely’s investigations 
were experimental, and resulted in a gun; Dr. Hart’s were mathema- 
tical, and resulted in a formula. Both are presumed to be original; at 
all events they were distinct, and the question of priority or synchronism 
seems perfectly immaterial. 
MONDAY, MAY 28, 1860. 
Gitzert Sanpers, Esq., in the Chair. 
Mr. Guorcx J. Sronry read a paper “On the Propagation of Waves.” 
Mr. Davin Moors, Curator of the Royal Dublin Society’s Botanic 
Garden, Glasnevin, read the following— 
RESULTS OF FARTHER PHYSIOLOGICAL EXPERIMENTS ON THE FORMATION OF - 
WOOD IN DICOTYLEDONOUS PLANTS, MADE IN THE ROYAL DUBLIN SOCLETY’S 
BOTANIC GARDEN BETWEEN THE YEARS 1851 AND 1860. 
Tw the year 1851 I had the honour to make known to the Academy the 
results of a series of physiological experiments which had then been 
made in the Botanic Garden, with a view to ascertain the nature of the 
formation of wood in dicotyledonous plants, which I detailed in a paper 
published in the ‘“ Proceedings” of the Academy, vol. v.p.1. Those 
experiments had extended over twelve years (from 1839 to 1851), and 
were only in a progressive state at the time the paper was read. The 
object of the present communication is, therefore, to state some further 
results, which have been ascertained since that time, and also to notice 
other experiments of a different kind, though made for the same purpose, 
during the interval between 1851 and 1860. 
On referénce to the paper I have alluded to, it will be found the 
principal experiment made was on the bole of a large tree, nearly five 
feet in circumference, which was bored at right angles through the 
centre, each bore being seven inches wide,—thus occupying half the 
space of the circumference of the tree, which was then left standing on 
four pillars of wood, occupying the other half. The whole of the wood 
portion soon became dead, and served only the purpose of acting as sup- 
ports for the bole, without any of the functions of vitality being carried 
on through its medium: consequently, the bark covering the pillars 
of dead wood were the only parts in that portion of the tree where 
