6 0. E. SCHIOTZ. [NORW. POL. EXP. 
Hohwii | Kutter—Hohwi t2 Rate of Hohwii| Rate of Kutter 
In interval In interval 
m Ss. Ss. Ss. 
1893 | July 29 0 32 p.m. — 47 38°80 : 
» | > 80] 114tam | —a7ast9 | it nes rere 
» » 3 5 46 p.m. — 47 37°72 Fj a 
There were two thermometers belonging to the pendulum apparatus of 
the expedition, marked 23 and 24, Thermometer 23 was used in all the 
observations carried out during the time of drifting, except the one observa- 
tion on the ice on June 8th, 1895, when another thermometer, SODERBERG 
No. 114, was employed, because the temperature was too low for the pendulum 
thermometers. 
The correction for Séderberg No. 114 was zero between — 7° and + 5°. 
Colonel von Sterneck has supplied the following reduction-formula for the 
pendulum thermometers. 
Thermometer 23 ¢° C. = 1°988 (reading — 2°66) 
— 2 = ¢° C.=1'903 (reading — 2°16) 
After the return of the expedition, thermometer 23 was accidentally 
broken while I was comparing it with a thermometer Tonnelot 4519, of which 
the correction was determined by the “Bureau International des Poids et 
Mesures” at Breteuil. Both thermometers, as well as a pendulum thermo- 
meter 20, belonging to the Norwegian “Gradmaalings Kommission”, were 
hanging side by side in a vessel full of water. I had fortunately taken the 
following readings before the accident occurred. 
July 29th, 1897. 
Tonnelot 4519 Pendulum therm. 20 Pendulum therm. 23 
15°.86 
11915 10°73 
15°.90 
16°.015 11:99 10°80 
Mean = 15°.947 11:953 10°765 
According to Colonel von Sterneck, the reduction-formula for thermo- 
meter 20 is: 
#° C. =1°863 (reading — 3°41). 
