294 Hare’s Blowpipe. 
the combustible ones which is exempt from the law of fusion 
by heat.’ 
Is there any apology for the manner in which Dr. Clark 
has brought himself and his friend before the public on this 
subject without the smallest acknowledgments for these. 
suggestions ? 
Clark's Gas Blowpipe. 
In proceeding io state the revival of two of the metals of 
the earths before the flame of the gas blowpipe, and of other 
metals under similar circumstances, it may be proper to pre- 
fix the ingenious theory of the Reverend J. Houde of St. 
Peters’ College, Cambridge, respecting the cause of the de- 
composition that takes place. “It is entirely owing to the 
powerful attraction which hydrogen has to oxygen at such an 
exalted temperature.’ he reduction or decomposition of 
oxydes when exposed to the ‘ aseous flame”* is therefore 
often instantaneous, and it is e ey followed by the 
combustion of the minute lés thus revived, and ulti- 
mately by the deposition of ihe 5 he regenerated oxyde which is 
a result of that combustion. Hence.the coloured flame ; 
hence also the appearance of an oxyde in a state of incom-. 
parably extreme division upon the supports used whether of 
metal or charcoal ; an irrefragable test of the revival of the 
metal from whose ‘combustion nos newly formed oxyde has 
been derived. 
Peciaa on 5 Shui: 
Hare, 1st part 6th Vol. American Philosophical Transae- 
tions, pase 100, republished Annales de Chimie, Vol. 5 
page 81.“ “About the same time I discovered strontites to 
bea fusible srnetayee 5 for having obtained a portion of this 
earth pure, from a specimen of the carbonat of strontites of 
Argytehane Ge in iain I exposed it- on charcoa 
ompound blowpipe after the manner describ- 
ed in my nto above alluded to. It became fused into 
— semivitreous mass in shape somewhat semi-glob- 
ts The very phrase nsed by me in my original memoir. 
