Popular Science Monthly 



EXPANSION SPACES TO, ALLOW OIL TO EXPAND 



FUEL OIL IN TANKS ON \ 



BOTH SIDES TOIPRO- 



TECT BOILERS AND 



ENGINE 'A 



The typical oil-tank steamship shown in section at the top and the proposed freighter beneath 

 it indicate the great similarity between the two types. The oil tanks are practically made over 

 into cargo holds. The small transverse section of the boiler and engine room of the upper diagram 

 shows its vulnerability to torpedo attack in that portion of the ship. The lower diagram shows 

 how the vitals in a similar section of the proposed ship will be protected by means of fuel-oil tanks 



In the proposed freighter, the hull will be divided into a dozen or more small compartments 

 and the engines and boilers will be protected by means of fuel-oil tanks extending clear around 



