fra hvilken der gaar en Snor over en Metalrulle paa 
Toppen af Røret, derfra over en anden Rulle paa Toppen 
af Skalaen, og Tampen er stukket gjennem et lidet Blylod, 
der vandrer mellem to tynde Messingstænger langs Skalaen, 
down to bring its lower extremity well below the level of 
the lowest load water-line. It was provided with a blind, 
to prevent the water from pumping in the tube by reason 
of the motion of the vessel. In this upper tube there was 
og som fæstes til Snoren ved at man trykker ind en liden 
Trækile nedenfra i det Hul, gjennem hvilket Snoren er 
trukket. 
Under Skibets Fart forover trykkes Vandet op i 
Stigerøret, og eftersom Flyderen kommer højere, synker 
Loddet langs Skalaen. Saasnart Farten er bleven jevn, 
staar Loddet uforandret paa samme Højde paa Skalaen, 
hvor Fartens Størrelse da kan aflæses i et Øjeblik. 
ver 
pg 
on 
“0 50 Cm / 
0 10 20 30 
L LI 
120n3 6 3 0 7 Fool 
————T—T—T——T—== === 
5 Meter 
[121s je Peck 
mr UT VU 
a float, from which a line passed first over a brass roller 
at the top of the tube and then over another at the top 
of a graduated scale, the end of the line being rove through 
a small leaden weight, that played against the scale between 
two slender brass rods and was made fast to the line by 
inserting from below a small wooden wedge into the open- 
ing through which the former passed. 
Now, on the ship moving ahead, the water will be 
forced up in the upper tube and the weight descend along 
the scale as the float rises. So soon as the speed has 
become uniform, the weight will keep stationary, at the 
same point on the scale, and the rate may then be read 
off at a glance. 
