336 Review of Renwick z 
~~ ota OO and hence dangerous accidents occur without giving 
e to blame, mati thus diminish a abiein feeling of. responsibility.— 
As 102, 103. 
od A great proportion of the fatal accidents which have occurred in 
‘steam boats, have arisen from a collapsing of the boilers; that is, in 
consequence of the sudden formation of a vacuum in the boiler, by _ 
which means the sides of the boiler have been crushed together by j 
~ external pressure, and the hot water and steam forced out with great 
violence. It seems a very easy matter to provide against this source — 
of danger, by attaching to the upper parts of the boiler an air valve — 
inwards. Whenever the tension of the steam becomes less 
tn pressure of the — the valve will open and restore 
quilibrium. 
Finally, notwithstanding the diesnes inherent in the empléyttient ' 
of aforce of such tremendous energy as steam, yet iteis easy to over- 
rate the actual ere When steam boats explode, the catastrophe 
Ives so many sufferers, and becomes so widely known and 
discussed, that the dangers are great | in comparison with 
those more silent and v unobtrusive but not less real dangers, that attend 
all the other modes of travelling by sea and land. One flies from the 
city of the plague and meets a watery grave ; another shuns the seas 
and finds the pestilence on land. 
my Frustra cruento Marte carebimus,’ 
; ’ Fractisque rauci fluctibus Adriz. 
“We e are happy to be able to conclude this article by presenting to 
our readers, the following facts and observations, obligingly commu- 
nicated to us by a valued correspondent.* 
List of | Steam Boat Explosions which have occurred in de U. States. | 
HIGH PRESSURE. | 
_ Names. Place of explosion. 
Constitution, - Ohio, 13 killed. 
Gen. Robinson, Mississippi, 9 “ i 
Yankee, sete st ' 4 cc 
Heriot, ss ) ak 
i AXtna, “RY. Bay. 13.“ 
1828, Grampus, | Mississippi, Unknown. 
* L.I. Sound, 1 killed. 
Helen co MeGreg Mississippi, 33.“ 
74 
Mae, C. Redfield, of New York. Ms 
rk a 
* 
te * 
