22 F. L. Ekman, 



borg. It should be remarked, that for a considerable time previouslj^ 

 uniform and calm smnmer weather had prevailed, that the little wind, 

 there was at the time, blew out from the mouth of the river and that 

 the waters level Avas sinking. In a distance of 37300 Sweedish feet (1 

 Foot = 0.2;)7 mètres = 11.689 English inches), half of which lay within 

 and half without the river's mouth, I on that day took samples of water 

 at 10 different places on the middle line of the water's breadth, where 

 the depth is greatest. That depth in the river was 2 ^/g Sweedish fathoms 

 (the fathom being = 1.78 mètres) but in ascending the river was gra- 

 dually reduced to 2 fathoms. In the fjord outside the mouth of the 

 river (Elf sborgsf jorden) the depth gradually increased from 3 to 7 fa- 

 thoms. At each of the 10 points one sample was taken at least for 

 each fathom of depth, beginning at the surface and continuing to the 

 bottom. The saltness ') per mille of each sample will be found in the 

 following table, which at the same time gives the distance in Sweedish 

 feet of each point from the river's mouth, and the depth in fathoms, at 

 which the sample was taken. I have added in parentheses the specific 

 weigtli of each sample, which was first determined directly with twoo ex- 

 cellent areometers, and then reduced to the specific weight at the tem- 



P 15" 

 perature of y-,^ centigr. "). 



') A detailed account of the methods einplo3'ed in this investigation etc. will 

 be found in the paper published in the «Svenska Vetenskaps-Akademiens Förhandlin- 

 gar» referred to above on the first page. 



-) It would contribiitc both to simplicity and clearness, if, in expressing the 

 spec, weights of various substances, writers would adopt the notation —, in which 

 T signifies the temperature of tlie substance, and t that of the pure water. 



