DANGERS OF BLIZZARDS 325 



able the records do not give the full force of the wind. The 

 direction of the wind has been entered on the records, and in the 

 line below the direction the time has been shown, as the time 

 printed on the charts was not correct. 



The record for March 12, 1911, is typical of the blizzards 

 during the first months after our arrival, when the depots were 

 being laid and the first ponies were lost (Fig. 2). 



The record for July 23, 1911, is interesting as this was the 

 blizzard which nearly proved fatal to Wilson's party at Cape 

 Crozier. The important thing to notice in this record is the 

 extreme gustiness of the wind: in the hour between 7 P.M. and 

 8 P.M. the wind varied in velocity between 24 and 84 miles an 

 hour (Fig. 3). 



One of the most dangerous peculiarities of the blizzards was 

 the suddenness with which they commenced. Three examples 

 of the sudden setting in of blizzards are shown in Fig. 4. 



The following tables contain the chief meteorological results 

 as far as they were worked out at the time of writing. The 

 Framheim results, taken from Amundsen's' ' The South Pole,' 

 have been included for ready reference. 



BAROMETER 



The barometer observations have been reduced to sea-level 

 and normal temperature and gravity, except in the case of Fram- 

 heim, which needs approximately -03 inch adding to reduce to 

 sea-level (see Amundsen's 'The South Pole'). 



WIND 



The Cape Evans wind amounts are from a continuous record 

 by a self-recording Robinson anemometer. 



The Framheim wind amounts are from observations made 

 with a portable anemometer for a few minutes three times a day. 



The Cape Adare wind was estimated on the Beaufort Scale 

 and reduced to miles per hour by the equivalents used in the Lon- 

 don Meteorological Office. 



