H. MOHN. 



M.-N. Kl. 



J L 



V. 



TTl/. 



The barometers were suspended in the kitchen on the inner wall 

 between the kitchen and the dwelling-room. The door between these rooms 

 stood open, so that the barometers were behind it and sheltered by it 

 from the radiant heat of the range. The door between the kitchen and the 

 entry opened inwards and sheltered the instru- 

 ments from the cold air of the latter. 



The readings of the Adie have been reduced 

 to o° C, to the normal barometer ( — 0.65 mm.), to 

 normal gravity (4- 1.85 mm. at 758.6 mm.) and to 

 sea-level. 



The height of the cistern of the barometer was 

 found by Mr. B. J. Birkeland to be ii.i m. above 

 sea-level by means of synchronous observations at 

 Framheim and onboard the »Fram«. 



2. Thermometers. 



Küchler No. 17. Toluol. Corr. o°.o. Apr. i. to June 29. 



8. a.m. and Sept. 29. to Dec. 24. 

 Küchler No. 884. Toluol. Corr. — o°.5. June 29. to 



Sept. 29. 

 Küchler No. 1308. Mercury. Corr. — ^ o°.2. Dec. 25. 

 to Jan. 29. 



The zero- points of the thermometers were ob- 

 served in melting snow several times during the 

 time they were in use. For observation they were slung like a sling- 

 thermometer. 



The observed temperatures have been checked, when possible, by 

 comparison with the thermograms. The thermograph, standing in the 

 screen, does not generally give values that accord well with those ob- 

 served on the sling thermometers, and very often fails to register. 



3. Hygrometers. 



Psychrometrical observations were not practicable in the low tempe- 

 rature of Framheim. Happily the Expedition was provided with two hair 

 hygrometers of Russeltvedt's construction, Nos. 12 and 14, with instructions 

 for their use. This instrument is described in the »Meteorologische Zeit- 

 schrift«, 1908, p. 369. It has the advantage of having no axles or sockets to 

 become rusty, or soiled, or filled with rime or drifting snow. Two horse- 

 hairs act by torsion upon a pointer moving in a horizontal plane and read 

 on a circular scale. Russeltvedts hygrometers have been employed in 

 Norway for several years at inland stations where the winter is very cold, 



Fig, I. 

 a Dwelling-Room, b Kit- 

 chen, c Entry, B Baro- 

 meters, r Range. 



