ov hae RAPPORT 1903—04 ANNEXE A 
IV. Water Bottles: 
A new pattern of W. Exman’s reversing water bottle mentioned in last 
year’s report has been constructed. This is for fixing to the side of the line and 
has an arrangement for releasing a messenger below, on reversing. In this way 
any number of water bottles may, as first proposed by Mm, be put on the 
same line. 
Experiments are being carried out with a water bottle for taking samples 
at moderate dépths while under way. 
V. Current Meters: 
The two kinds of current meter mentioned in last years’s report have been 
improved, and their construction may now be regarded as definitely fixed. The 
Nansen current-meter (with pendulum) is supplied complete with tripod for the 
measurement of bottom-currents at a price of 350 Kroner, the Exman current meter 
(with propeller) at a price of 175 Kroner; certificate included. Six current-meters 
have up to date been ordered and sent out. 
Experiments to make the suspension of the current-meter independent of 
the motion of the anchored ship have been continued. The difficulties have been 
great and are not yet overcome (except when measuring the bottom-currents from 
the tripod) but there is good reason to believe that the problem will soon be 
succesfully solved. The experiments have proved that observation of slow currents 
(below 10cm per second, say) directly from the ship, even when anchored by two 
anchors, are of no value, except under particularly favourable circumstances. 
VI. Bottom Sampler: 
An improved modification of F. L. Exman’s apparatus for bringing up samples 
of the sea-bottom has been constructed. The lower valve which is initially 
suspended outside the long collecting tube, at the top, drops down into place 
when the apparatus hits the bottom. The different layers then penetrate into the 
tube quite undisturbed; a fan at the top makes the instrument fall vertically. The 
iron collecting tube is fitted inside with a thin split brass tube which can be taken 
out and opened; the whole sample quite undisturbed can then be seen. The 
apparatus has worked very well and is confidently recommended. With this appa- 
ratus samples up to 180 cms long have been taken. Experiments have also been 
made with great success to fit glass tubes joined together with short pieces of 
india-rubber tubing, inside the tube of this bottom sampler. The sample is then 
collected directly inside; the glass tubing with the clay can be removed and the 
stratification beautifully seen in all its minutest details, the tubes can be covered 
with tin foil and bladder at the ends and put aside for subsequent investigation, 
quite undisturbed. 
