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RECORD AND DISCUSSION OF TEMPERATURES. 



"On February 8th, 1858, the mercurial standard No. 19 fell steadily to — 40°. 2 ; 

 then the mercury appeared to freeze, and descended into the bulb. Had the stem 

 been graduated down to the neck of the bulb, it would then have indicated — 70°. 

 A -lobule of mercury corked up in a small test-tube remained fluid. Two other 

 mercurial thermometers (good instruments) were exposed; one fell to — 42°, the 

 other to — 40°.5. This was a very fair set of observations ; the thermometers were 

 taken to a distance from the ship, and freely suspended at five feet above the snow." 



Taking the mean of the three Kew standards, Nos. 19, 8, and G, and comparing 

 the same with the readings of Newman, Nos. 11 and 7, we obtain the following 

 corrections to each of the registering thermometers : — 



From the above, it appears that the following small corrections may properly be 

 applied, viz : — 



For thermometer, Newman No. 11, used in wiuter 1857-58 — 



Between 0° and —39°, — 0°.2 



" _39 " —48, —1.6 



For thermometer, Newman No. 7, nsed from Sept. 1858 to Aug. 1859 — 



Between 0° and —39°, — 0°.5 



" _39 " —48, —1.8 



As remarked above, no correction is applied to the record, and to the results only 

 when specially stated. 



There were a number of other thermometers on board; but, since the numbers 

 of these instruments are not given in connection with the observations, it suffices 

 to show that their corrections are small. The following table is copied from p. 3 

 of the Meteorological Register in the fourth number of the papers published by 

 authority of the Board of Trade : — 



Spirit Tit krmometers. 



B SCTIONS AT 



Compared at Kew, Nov. 1 859. 



