Popular Science Monthly 



407 



peculiar fish with a cod-like head, called 

 tinteraro by the natives. Finally the en- 

 gineer hit upon the plan of caging his 

 men. Uprights were placed on the four 

 corners of the weighted scaffolds upon 

 which the divers stood, and wire netting 

 was run around the three sides. The 

 tintcraros would make a rush for the 

 men, but stubbed their noses against the 

 netting. Men were always on duty with 

 pikes to assist if the cage should give 

 way. After nightfall the fish were at- 

 tracted by hundreds, and it was feared 

 that the combined weight of many of 

 them would break the netting. Fortu- 

 nately, it held until the operations were 



u ^ 





was an eighteen by eighteen-foot canvas 

 used inside the hull to close the wound. 

 A\ hen all the hatches and deck were 

 thoroughly sealed compressed air was 

 turned into the hold, and the water re- 

 ceded as the canvas was put in place. 

 After only four days of work the craft 

 was towed toward the shore and beached. 

 There the' job was completed. 



The steel patches were put on when 

 the rent was still below the surface of 

 the water, but where the surf could not 

 harm her. A template was made to lay 

 out the plating, i. e., a full-size pattern 

 to show the exact size and shape of the 

 hole and the location of any existing 

 rivet-holes in the plating which might 

 still serve to attach the new plates. The 

 ])lating required was then laid out and 

 drilled on deck. 



Meanwhile the sand hogs, working in- 

 the compressed air, had driven out the 

 ri\ets in the plating of the ship, where 

 the holes would serve for the new plates. 

 At certain points they drilled new holes, 

 putting a wooden plug in each. The 

 steel patch was then lowered section by 

 section, by a derrick. Starting at the 

 top, these sections were bolted in place 

 over the rent. One by one the bolts were 



Before the wreckers 

 could start to raise 

 the sunken steamer 

 it was necessary to 

 seal every opening 



completed, 

 cofferdam was 

 erected on deck 

 to bring the 

 space to the same 

 height and to 

 facilitate drain- 

 ing the sunken 

 body of the 

 ship. T h e cof- 

 ferdam is the 

 above-mentioned 

 "l)oard fence," 

 and the motion- 

 picture screen 



Lowering the plate into position so as to cover the vent in the side of 

 the ship, made by the explosion. This was done under the direction 

 of the divers by the derrick on the ship's deck. The divers placed it 

 in position and set the bolts, which were fastened on the inside 



with nuts 



