246 Report of the Select Committee 
1000/.; the Majestic cost about 20002. and the engine about 
20002. more; the Thames cost 2500/, including the engine, at 
‘about 1200/.; the new vessel that I built to go to Richmond, 
the hull and joiners’ work cost 750/. and an engine of fourteen- 
horse power and apparatus cost 1170/.; the new Gravesend 
' steam-yacht, the hull only has cost 750/. and the engine, 13702.; 
but there will be various other expenses before these vessels are 
finished. 
Can you tell what is the expense of the boiler alone ?>—I have 
just got a new boiler from Messrs. Jessops of Butterley, for the 
Thames steam-y acht,: and I pay for the boiler 215/. 
What additional expense do you apprehend is incurred in a 
boiler of these dimensions by having it of wrought iron, beyond 
what it would cost if made of cast metal >—Never having had 
any cast-iron boilers, I do not feel myself competent to give a 
satisfactory answer. 
What additional expense would be incurred by the addition 
of an additional safety-valve?—That would depend upon the 
dimensions of the safety-valve, but in general the additional ex- 
pense would be under 42, 
You mean that each safety-valve costs about that sum ?—The 
most costly of them cost about that sum. 
Did you ever apply a mercurial tube as a safety-valve ?—Ne- 
ver : I have to each of the boilers a mercurial barometer, that 
operates as an indicator of the height and pressure of the steam. 
Whereabouts is the expense of that barometer ?—I do not re- 
collect, but certainly not more than 2/. 
Did you see the Norwich steam-packet which exploded r7—l 
have been on board her, and performed a voyage with her ; I 
went down with a view of purchasing it ; I went down for that 
purpose twice. 
What was your reason for not purchasing it ?—Because it 
was a high pressure engine, and liable to the accident which has — 
since occurred. 
Was that your sole reason?—Yes; I went a second time with 
a party of German gentlemen from Bremen, who were anxious 
to make an immediate purchase of a steam-vessel ; and they also 
declined to purchase that or any, of the boats upon the river Yare, 
solely because they had high pressure steam-engines on board. 
Did you examine the boiler which exploded when you were on 
board the vessel at Norwich ?—I did. 
What opinion did you form respecting that boiler ?—I thought 
that it was isnjudiciously composed, as I found that the barrel or 
cylinder of the boiler was of wrought iron riveted together; of 
that part I approved, but I found that one of the ends was a 
flat plate of cast iron, and as these two metals under the same 
degree 
