Den Norske Nordhavs-expedition 1876-1878 / The Norwegian North-Atlantic Expedition 1876-1878 / 2. Bind / 12 (1880-1901) Table of Contents / Innehåll | << Previous | Next >>
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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

Fig. 8.

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.

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
opening 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.

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