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46
I 1876 anvendtes, foruden den almindelige Log med
Flyndre og Line. ogsaa Masseys Patentlog. Denne viste
sig ikke synderlig hensigtsmæssig paa Grund af de hyppige
Standsninger, og et Par Exemplarer gik i Skruen og
tabtes. Der savnedes ogsaa god Lejlighed til at kontrollere
dens Nøjagtighed. I 1877 indsattes den af
Premierlieutenant M. Petersen arrangerede Vandlog, hvis Anordning
On the first cruise, in 1876. we used Massey’s patent
log. as well as the common log with logchips and line.
The first instrument, however, did not answer well, owing
to the frequent stoppages; and on one or two occasions
it fouled the screw, and was lost. Moreover, we had no
good opportunity whereby to test its accuracy. In 1877.
the "Vøringen" was furnished with a water-Jog, the inven-
Fig. -JI.
ombord i -’Yøriifgen" sees af Fig. 21. der viser et Tversnit
af "Vøringen" gjennem den agterste Del af Maskinrummet,
seet forfra agterover. Vandloggen har følgende Indretning.
Paa et bekvemt Sted i Maskinrummet bores et Hul
i Skibshunden og fores med et 1 Toms Rør. Over dette
anbringes med Flens Røret b (se den lille Figur) saaledes,
at Aabningen i dette danner en Fortsættelse af Hullet i
Bunden. Paa Midten af dette Rør er en konisk Kran og
omkring dets øvre Ende er Skruegjænger til
Pakningsrin-gen c. Gjennem Røret b og Hullet i Skibshunden nedsættes
Røret a saa langt, at den lille Aabning i dets nedre Ende.
tion of Lieutenant M. Petersen. Fig. 21. representing a
transverse section of the after part of the engine-room, as
seen looking aft. shows the arraugement of the water-log
on board.
In some convenient spot in the engine-room, a hole
was bored in the ship’s bottom to receive a one-inch metal
tube, having fixed on to its top end the flange of the tube
b (see small Figure), in such manner that the bore of the
latter would form a continuation of the hole in the ship’s
bottom. This tube had a conical stop-cock, and its upper
extremity screw-threads fitting into the gland c. The tube
a was passed through the tube b and the hole in the ship’s
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