OF OBSERVATIONS FOR TEMPERATURE. 31 



strewn over the land, but from below six inches it was of a yellowish mud. The 

 thermometer used was one of very small bore, with a long stem finely graduated 

 (it had been prepared for taking temperatures of trees). From 18th to 29th Sep- 

 tember, 1858, no register was made, as the ship was not in port; also from 18th 

 to 28th March, 1859, as I was absent from the ship travelling. The minimum 

 temperature registered was +0°-5, on March 10th, 1859; the lowest may be as- 

 sumed as at zero, on March 16th. The register was continued until June 18th, 

 when water entered the tube, and the thermometer was frozen to the side so that 

 it could not be detached. Column No. 1 gives the register of this thermometer. 

 Column No. 2 gives the depth of overlaying snow, which was always greater than 

 the average on the land. On 17th January, 1859, a tube was placed one foot one 

 inch deep in a mixture of shingle and earth ; in this a thermometer was placed. 

 The position of the ground was such that scarcely any snow lay upon it, the strong 

 wind constantly blowing removing it almost as soon as deposited. Column No. 3 

 is the register of this thermometer. February 12th, 1859, a tube was placed hori- 

 zontally on the surface of the ground, beneath the snow lying on the ground, 

 where thermometer No. 1 was sunk. The temperature as shown by this thermo- 

 meter (Column No. 4) was registered until the snow all disappeared. Column No. 

 5 gives the mean temperature of the air for the day on which the registers of the 

 diiferent thermometers were taken. Column No. 6 gives the mean temperature 

 of the air for the number of days or hours intervening between the registers of the 

 thermometers. All the temperatures of the different thermometers are corrected 

 so as to reduce them to the standard of the air thermometer, comparisons having 

 previously been made as opportunity offered." 



(Signed) DAVID WALKER. 



