28 



Date and depth. 



1899. March 22. 

 122 fathoms. 



468 fathoms. 



1899. April 3. 

 809 fathoms. 



1899. August 9. 

 459 fathoms. 



1899. Sept. 16. 

 1 1 1 1 fathoms. 



1899. Dec. 3. 

 2753 fathoms. 



1900. Febr. 10. 

 1442 fathoms. 



Accidents. 



Pianowire breaks. One cocklcad, 

 one waterbottlc, onc reversing 

 thermometer lost with 87 metres 

 of wire. 



Stray line of TANNER's line 

 broken. Sigsbee lead and rever- 

 sing thermometer lost. 



Pianowire broke; lost: lead of 

 25 kilogram with reversing ther- 

 mometer. 



Waterbottle and 

 thermometer lost. 



Wire broke off at thermometer. 

 Lead and thermometer lost. 



The outside attendant's finger 

 caught in the pulley and was 

 cut off. 



2600 metres of wire, one cock- 

 lead and one reversing thermo- 

 meter lost. 



Cause and remarks. 



The lead struck the ground, wire broken 

 because of heave of the ship. 



Stray line of six strands, probably defective, 

 broke off sharp. 



Sincc than only doublé twisted flag-chord 

 was used. 



Wire run out of top-pulley, kinked and 

 broke. 



Indicator still registered 50 metres when 

 suddenly the stray line ran into the reel, and 

 the line broke. 



Pointer of indicator had probably slipped. 

 Outside attendant's warning to stop when he 

 saw the weight of the stray line, was not heard 

 on account of the noise of the machine. 



Wire was found to be wrenched off, probably 

 due to the revolving, caused by the fixed screw 

 of the reversing frame. 



One of the component strands, which was 

 found to be snapped, caught the hand of the 

 assistant who did not let go his rag in time. 

 Before the machine could be stopped his finger 

 got cut off. 



By the rolling of the ship the wire got slack 

 and got caught in the toothwheel of the winch. 

 As the brake did not act promptly, the winding 

 drum continued to revolve. The wire beins' 

 damaged got broken by the next heave of 

 the ship. 



This last accident showed the clesirability of having the wire rove through an oblong 

 eye lïxed to the machine just above the point where the wire reaches the winding-drum. 



For even should a momentary slack occur in the wire, this would prevent the wire 

 leaping off the drum. 



THE LUCAS DEEP SEA SOUNDING-MACHINE SMALL SIZE AS USED ON 



BOARD H. M. SIBOGA. 



Description of the machine. 



(Fig. 11). 



This consists of two vertical cast-iron frames BB connected together and carrying between 

 them the winding-drum A, capable of holding 400 fathoms of 0.9 mm. steel wire. 



