THE TERRA NOVA GOES SOUTH 



67 



measurements. Great also have been the achievements in 

 ski-running under Lieutenant Gran's tuition. The sounding 

 apparatus consists of an iron pipe about a foot long containing 

 a valve. This is connected to several miles of piano wire, 

 and an iron weight carries the apparatus to the bottom, where 

 it is released by a trigger so as to involve less labour in 

 hauling up the valve-pipe. A small telegraph winch is 



SO" 



.ding 

 re 



•m 



direction. 



Grooved Needle 

 South end 





mounted on the port bow, and here the afterguard in batches 

 of six have spent many profitable hours winding up miles of 

 piano wire. Samples of the bottom are caught by the valve. 

 Reversing thermometers and water-bottles, bringing up samples 

 of water for analysis, all these are hung at intervals along the 

 wire. On almost every occasion small fragments of volcanic 

 ash have been collected, which seems to imply that this forms 



