HYDROGRAPHICAL SECTION — JULY 1905 ( 36 ) 
Prof. Prrrersson gave a discourse on the annual periodicity of the hydro- 
graphical conditions. His lecture called forth some discussion. | 
Prof. Nansen reported on the work of the Central Laboratory, compressibility 
of sea-water, water-bottles and methods for measuring currents. A discussion followed. 
Prof. Winp discoursed on the Dutch experiments regarding the measurement 
of currents. 
The meeting closed at 5-19 p. m. 
O. PETTERSSON 
Martin KNUDSEN 
Appendix A 
Proposals of the meeting of Hydrographical Assistants 
of 18—23 July, 1904 
The meeting of hydrographers, engaged as assistants in the international 
cooperation, submits the following proposals to the kindly consideration of the 
directors of the hydrographic researches in each country concerned: * 
A. It is proposed that chemical investigation of the substances, which have 
a direct bearing on the existence of animal and vegetable life should be carried 
out as an essential part of the hydrographic work. 
B. It is proposed that direct current measurements should be made, at the 
surface and also in the depth. 
C. It is proposed that observations should be conducted over certain areas 
of the territory for the international researches which have not hitherto been invest- 
igated. $ 
D. It is proposed that hydrographic investigations should be carried on 
during the intervals between the quarterly cruises. 
