232 



Popular Science Monthly 



Holes drilled in 

 cover of pump 

 and filled with .. 

 tar, black dirt.etc 



What was 

 expected 

 to happen 



Holes were drilled in the cylinder-heads of 

 pumps, filled with dirt and then painted over, 

 with the anticipated hope of giving someone 

 an unexpected bath had the pumps been 

 started before the holes were discovered 



Small bolts holding 

 together the lagging 

 of steam connec- 

 tions were sawed 

 half through and 

 then replaced. Had 

 the steam chests 

 been under pressure 

 the bolts would 

 have broken and an 

 explosion would 

 have taken place 



way through 



fire-room came next, Throttle hand 

 every nook receiving the' wheel 

 closest scrutiny. Then 

 came a trip through the 

 furnaces, the combus- 

 tion chambers beyond, 

 the grimy -uptakes and 

 the long and tortuous 

 connections of the great 

 smokestacks and up 

 their sooty ladders to what 

 should have been the sky, but 

 what proved to be heavy wooden 

 covers fastened across the stacks, all 

 carefully concealed from view. 



This task done, the engine 

 room was reinspected, to 

 locate the pipes and valves 

 Next in turn were the 

 enormous bunkers, 

 tanks, water-tight 

 doors and bulkheads, 

 reaching from one 

 end of the ship to 

 the other, from 

 the highest deck 

 down to the 

 bottom - most 

 chamber of the 

 hold. What 

 would have hap- 

 pened had the 

 flashlight gone 

 out ? Would the 

 man have fouad 

 his way out 

 again ? 



Valve stem 



\Main stem pipe 

 from boiler 



Section of flange Other flange 



drilled around and drilled ready 



broken out with to break out 

 sledge hammer. 



Broken flanges on main 

 steam elbows. The sec- 

 -tions were first drilled 

 around and then broken 

 out with sledge hammers 



At left: The main throttle 

 valves had been removed 

 and destroyed, leaving 

 only theempty valve bodies 



Tar, Cord 



Tin can 



Coal dust Powder 



Twenty-four bombs were 

 found in the coal bunkers. 

 Is it any wonder the coal 

 was screened four times? 

 The bombs were simply 

 tin-boxes wrapped with 

 twine. After they were 

 dipped in tar and rolled 

 in coal dust they were 

 placed with the coal. 

 Each bomb was found to 

 contain a high explosive 



