14 



OBSERVATIONS AND RESULTS IN PHYSICAL OCEANOGRAPHY 



From this table it is seen tl;at the difference is inde- 

 pendent of depth if the wire angle is from 0^ to 5° but 

 the range of the differences increases with depth as was 

 expected. If the wire angle is from 6' to 10° the differ- 

 ence increases with increasing wire length in agreement 

 with the fact that the thermometer depth, if exactly de- 

 termined, must be smaller than the wire length and the 

 difference must increase with depth. In this case we 

 find also that the maximum range increases with depth 

 but the maximum ranges are greater than in case of the 

 wire angle from 0° to 5°. The last result is easily ac- 

 counted for by the fact that the curvature of the wire en- 

 ters as an uncertain element if the wire angle is appre- 

 ciable. 



On the basis of the preceding discussion the accura- 

 cy of the thermometric determination of depth on board 



the Carnegie can be stated, assuming that the thermom- 

 eters have functioned properly. Extrapolating to 6000 

 meters we find: 



Depth 1000 2000 3000 4000 5000 6000 



Accuracy of 



thermometric 



determination of 



depth in meters +10 +12 +15 +20 +25 +30 



This accuracy is highly satisfactory. It is evident 

 that every uncertainty as to the depth, arising because of 

 great wire angle, can be eliminated by attaching pressure 

 thermometers to some of the water bottles along the 

 wire. 



LITERATURE CITED 



Ennis, C.C. 1933. Hydrog. Rev., vol. 10, pp. 131-135. 



May. 

 Schumacher, A. 1923. Ann. Hydrog., vol. 51, pp. 273- 



280. 

 Soule, F. M. 1933. Hydrog. Rev., vol. 10, pp. 126-130. 



May. 



Wust, G. 1932. Wissensch. Ergebn. d. Deut. Atlantischen 

 Exped. auf dem Forschungs- und Vermessungschiff 

 "Meteor," 1925-1927, vol. 4, Erster Teil, pp. 60- 

 177. 



