trouble ill the very cold temperatures, and every means was tried to overcome I his defect, Imt with no 

 satisfactory result. 



During the time we were at sea, the recording instruments were kept ut Greenwich mean time, lint on 

 the start of observations from the screen on the ice, Ship apparent time was used, and the records were 

 shifted on Mondays at 10 a.m. The pain caused to the observers of these instruments is really great at 

 times, for as it was nearly impossible to shift the papers with mits on, they had to be removed, and 

 handling the metal meant frost-bitten fingers. 



/;,w//V^'. Two and sometimes three of these were kept going on board, down in the living space. 

 They always seemed to work well, and there was no reason why they should not. If found to be very 

 different from the present time reading of the Mercurial Barometer, they were set to that reading. 



tion thermometers. 



ASSMAXN'S Aspirator. For a considerable time during our second year this instrument was in use, and 

 worked most satisfactorily. It was kept out at the screen, and was wound up on arrival of the observer 

 at the screen. He then proceeded to take the various other observations and read the aspirator last. 

 The observations, therefore, cannot be quite comparable with those of the dry- and wet-bulb thermometers, 

 as the changes of temperature were very rapid, instances of its falling having been observed whilst actually 

 reading the dry bulb. 



I think very highly of this instrument, although it is a most difficult one to use, its graduations being 

 so small, and there being so much metal connected with it. Moreover, the winding of it up with mits on 

 is by no means an easy task. Then, again, the wetting of the wet bulb means the unscrewing of the 

 protecting part, which, in our experience, necessitated removing one's mits. Taking it all in all, the 

 disadvantages of the instrument are great, but these, I think, could be overcome with a little trouble 

 before leaving home, and the readings which it affords represent, in my opinion, much more the true 

 air-temperature than those taken by the thermometer in the screen. 



G 



