WEIGHT OE MATEEIAL IN THE CONSTEUCTION OE IEON-CLAD SHIPS. 475 
Weight of hull=4.ABx 50x12 X afro tons 
=4^50# x^ 
=214 N /2#. 
Therefore, weight of hull, engines, and coal 
=214a/ 2#+ 2x32-5# 
=(65+214x/2>, 
and displacement, or total weight, 
=2000 + (65 + 214 N /2)#. 
But displacement is also equal to 
14a? x 2x 
2 
X25x-^s- 
whence 
= 10 # 2 ; 
10# 2 =2000 + (65 + 214v/2)#, 
#=41-5. 
The following, therefore, are the dimensions &c. of the new ship of the fig. 1 type, 
viz. — 
Length =14# = 581 feet. 
Breadth =2# = 83 „ 
Nominal horse-power =32*5# = 1350 H.P. 
Indicated horse-power=228# = 9450 „ 
Weight of hull =214\/2#= 12570 tons. 
Weight of engines =32-5# = 1350 „ 
Weight of coals = 32-5# = 1350 „ 
Weight carried = 2000 „ 
Total displacement . . 17270 tons. 
Taking next the shorter ship of fig. 2 type, and assuming 2# to be the breadth, as 
before, and therefore 10# the length, and 4# the length of the parallel portion, we have 
14 s x 50# 
: 500 
I. H.P. ■ 
= 274#. 
Pursuing the same process as before, and equating again the two values of the dis- 
placement, we shall have 
10# 2 = 1500 +299# 
and 
#=34*28. 
The following, therefore, are the dimensions &c. of the new ship of the shorter type, 
viz. — 
