APPENDIX D. 
ectations 
vessels, 
the wind 
in light 
noderate 
notion is 
buted to 
She has 
thens to 
vy. On 
d water, 
ch, for a 
msidered 
; of two 
lar metal 
will give 
TO 
THE NEW EDITION 
OF 
TREDGOLD ON THE STEAM ENGINE 
AND ON 
STEAM NAVI GATION. 
ON THE 
ARCHIMEDEAN SCREW, OR SUBMARINE PROPELLER; 
ILLUSTRATED BY 
A PLATE OF THE MACHINERY OF THE ARCHIMEDES STEAM VESSEL 
AND NUMEROUS WOOD-ENGRAVINGS. 
By ELIJAH GALLOWAY, Civil Engineer. 
where so 
LONDON: 
JOHN WEALE, 59, HIGH HOLBORN. 
i, Mate. 
1842.