-7 



APPENDIX 13: HELLAND-HANSEN 



17° C. As Robertson believes, the unusual bottom- water was a continuation of the 

 mixed water from the northern part of the Channel. 



It will be clearly seen from the figures, that very important variations occur in the 

 hydrographical position, not only during the year but even in the same month, when 

 one year is compared with another. (See Figs i and 4, for example, both sections 

 being for August). It is only when the investigations will have extended over a larger 

 number of years, that clearness will be gained regarding which variations are perhaps 

 periodic and occur so that their regularity may be ascertained, what their cause is, and 

 which variations on the other hand are of a more chance character. 



