O94 Hare’s Blowpupe. 
ihe combustible ones which is exempt from the law of fusior: 
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 to 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. Holme of St. 
Pevers’ College, Cambridge, respecting the cause of the de- 
composition that takes place. “itis entirely owing to the 
powerful attraction which hydrogen has to oxygen at such an 
exalted temperature.” The reduction or decomposition of 
oxydes when exposed to the “ gaseous flame’™* is therefore 
often instantaneous, and it is as instantly followed by the 
combustion of the minute particles thus revived, and ulti- 
mately by the deposition of the 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 this newly formed oxyde has 
been derived. 
Experiments on Strontites. 
Hare, Ist part 6th Vol. American Philosophical 'Transac- 
tions, page 100, republished Annales de Chimie, Vol. 5. 
page 81. ‘* About the same time I discovered strontites to 
be a fusible substance ; for having obtained a portion of this 
earth pure, from a specimen of the carbonat of strontites of 
Argyleshire in Scotland, | exposed it on charcoal to the 
flame of the compound blowpipe after the manner deserib- 
ed in my memoir above alluded to. It became fused into 
a blackish semivitreous mass in shape somewhat semi-glob- 
ular.” 
*'The very phrase used by mein my sriginal memoir: 
