[243 74 
XLII. Report of the Select Committee appointed to consider of 
the Means of preventing the Mischief of Explosion from hap- 
pening on board Steam- Boats, to the Danger or Destruction 
of His Majesty’s Subjects on board such Boats. 
{Continued from p. 182.] 
Mr.Grorct Dopp’s Evidence. 
Wauene is your residence ?—I reside at No. 8, Oxford-street. 
What is your profession ?—Civil engineer. 
Are you a proprietor of any steam-boats ?—1I have five under 
my direction. y 
Where are those steam-boats employed ?—T'wo between Lon- 
don and Richmond, one between London and Gravesend, and 
two between London and Margate. 
How long have they, or any of them, been in use ?—The 
Thames has been in use three years. 
Where does that go?—From London to Margate: the Ma- 
jestic has been in use about twelve months, that goes to and from 
Margate: the Richmond, from London to Richmond, has been 
in use about fifteen months; and the other two are new vessels ; 
all these vessels lie up in the winter. The Thames has not run 
from London to Margate during the whole three years; she has 
run from London to Margate two years, and was twelve months 
in Scotland before I had her. I finished the Thames Margate 
steam yacht at Port Glasgow in Scotland, and navigated her 
from Scotland to Dublin, and encountered a considerable deal 
of bad weather, and found her most perfectly safe. No material 
accident happened to the engine, which worked during the whole 
voyage; from Dublin I brought her round the Land’s End, Corn- 
wall, into the port of London, 
Are all the steam-boats that you now have, or that you have 
had, used with condensing engines ?—They are. 
Has any accident happened during the course of their being 
used ?—The boilers of two have been injured by the imprudence 
of the engine workers; but no accident of any description could 
or has occurred to the passengers. 
What was the nature of the accidents that happened to thosé 
boilers ?—The accident was the partial coming down of the 
boilers over the furnace mouth, being pressed down by the power 
of the steam, in consequence of the engine workers not suffi- 
ciently feeding the boilers, aud covering the flues with \water. 
What are all your boilers made of ?—They are made of sheet 
wrought iron, riveted together. 
Are they cylindrical ?—They are not ; they are flat-sided with 
flat roofs, and the others have dome roofs; there are at least 1500 
Q 2 rivets 
