4 0. E. SCHIOTZ. [NORW. POL. EXP. 
- During the expedition, the observations were made by Lieut. Scott- 
Hansen. Only one determination was made on shore, namely at Khabarova, 
at the mouth of the Kara Sea, all other observations being carried out 
while drifting with the ice. With the exception of the summer of 1895, when 
on the 8th, 10th and 11th June, the pendulum apparatus was set up on the 
ice near the vessel, all the observations were taken on board in the winter. 
The pendulum apparatus was set up on the iron cross belonging to it, with 
nothing between it and the solid floor of the saloon, near one long wall; 
while the coincidence apparatus was placed opposite to it, near the opposite wall, 
with an underlayer of folios. During the experiments, the observer had to 
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lie upon the floor parallel with the wall, and observe the greatest caution all 
the time in his movements; but the floor was so steady, that the level on the 
pendulum apparatus moved only very slightly when any one went close up 
to the apparatus. The observations were taken in the middle of the night, 
when no one but the observer was up, so that the apparatus was not exposed 
to any chance of disturbance. All the apparatuses were invariably set up very 
nearly on the same spots. Their situation will be seen from the accompa- 
nying sketch. 
