NORTH POLAR REGION contd. Total insolation received 



at 78 3 N., monthly values, I, 85. 

 NORTH RUSSIA Mean monthly departure from tin- aveiagi 



temperature during Summer, Winter, and Year, 



1,82. 

 NORTH WIND Cape Evans, relationship with pressure 



changes at Framheim and Cape Aclare, I, 236. 



Effects on temperature at Cape Evans, monthly 



values, I, 46. 

 Frequency, mean velocity, and total motion at Cape 



Evans, monthly values, I, 113. 



Gustiness at Cape Evans, I, 118. 



Number of observations at Cape Evans, monthly 



values, I, 114. 

 Relationship with changes in the barometer at Cape 



Evans, I, 231. 



o. 



ONE TON DEPOT Register kept on sledging journey from 

 Cape Evans, III, 592. 



OVERCAST SKIES Monthly variation of precentage, fre- 

 quency from two-yearly means at Cape Evans, 

 I, 153. 



P. 



PETERMANN ISLAND Annual variation of wind, monthly 



values, I, 98. 

 Mean yearly cloud average, I, 150. 



POLAR PARTY Register kept on sledging journey from 



Cape Evans, III, 618. 

 POLAR PLATEAU Air motion at approximately 3,000 



metres, I, 264. 

 Change of height in each half degree of latitude 



along the 160 E. meridian, I, 291. 



Heights of various points from Southern Barrier 

 Depot to the Pole, height above Barrier, height 

 above sea-level, and distance from Southern 

 Barrier Depot, I, 291 ; III, 233. 



Mean temperature in December and January reduced 

 to sea level compared with mean at Cape Evans 

 and Framheim and on South Barrier, I, 39. 



Pressure waves, changes of pressure and times of 

 occurrence, I, 214. 



Time of pressure waves on Plateau before that at 

 Framheim and Cape Evans, I, 215. 



PORT CHARCOT Mean yearly cloud average, I, 150. 



POTENTIAL GRADIENT Average during different wind 



strengths, I, 306. 

 Cape Evans, hourly values, III, 236. 



Daily variation at Cape Evans for seasons and year, 

 I, 314. 



During winds of 6 to 10 miles an hour at Cape Evans, 

 hourly values, I, 317. 



Mean at Cape Evans, monthly values, I, 312. 



Mean temperature of the hours for which the potential 

 gradient was determined in May, June, and July 

 at Cape Evans, I, 316. 



PRECIPITATION Number of times snow and drift recorded 

 in 100 hours at Cape Evans, monthly values, I, 161 ; 

 seasonal values, I, 102. 



PRESSURE Correlation coefficients after deducting the 

 MeMurdo Sound yearly variation, at Hut Point, 

 Gauss Station, and Snow Hill, I, 200. 



Correlation coefficients at Hut Point, Gauss Station. 

 Snow Hill, and Kerguelen, I, 197. 



PRESSURE cnntil. Correlation coefficients of monthly 

 departure* from normal between Mc.Mimlo Sound 

 and 31 stations mainly in the Southern hemisphere 

 in Australasia, South America. Indian Ocean, South 

 Africa and South Paeilie. I, L'OL'. 



Daily variation at Cape Adare, III, 224. 

 Daily variation at Cape Kvans, 111, L'^U. 

 Daily variation at Hut Point, III, 222. 



Daily variation at Hut Point and Cape Evans com- 

 bined, 111, 2-2:1. 



Daily variation, Fourier coefficients, Cape Adare, 

 III, 227. 



Daily variation, Fourier coefficients, MrMurdo Sound, 

 monthly and seasonal values, I, 179 ; III, 225 and 

 227. 



Daily variation, Phase of A2 in individual months, 

 I, 180. 



Daily variation, Twelve-hourly barometer oscillation 

 in the Antarctic at MeMurdo Sound, Belgiea, < 

 Station, Snow Hill, Laurie Island and South 

 Georgia, I, 182. 



Daily variation, Twelve-hourly barometer oscillation 

 in the Antarctic, observed and calculated constants, 

 I, 183. 



Difference between Cape Evans and Barrier, Novi -mix -i . 



1911, to January, 1912, I, 286. 

 Differences between January and July over the 



Antarctic, based on observations from 8 stations, 



I, 298 ; III, 230. 



Gradient over Ross Sea and Barrier, I, 136. 

 Hourly values, at Cape Adare, III, 208. 

 Hourly values at Cape Evans, III, 162. 



Large changes in Iceland, monthly and yearly values, 



I, 186. 

 Maximum: Absolute highest reading at MeMurdo 



Sound in four years, monthly values, I, 184. 



Maximum and minimum values at (.'ape Adare, 

 absolute extremes for each month, monthly means 

 of daily extremes and daily range, III. l2L".i. 



Maximum and minimum values at Hut Point and 

 Cape Evans, absolute extremes for each month, 

 monthly means of daily extremes and daily ramie. 

 Ill, 228. 



Minimum : Absolute lowest reading at MeMurdo Sound 

 in four years, monthly values, I, 184. 



Monthly departure from mean of twelve months. 

 at 'Hut Point, Gauss Station, Snow Hill, and 

 Kerguelen, I, 197. 



Monthly means at Cape Adare, two-yearly values. 



I, 174. 

 Monthly means at Cape Evans, Framheim and ('ape 



Adare, March, 1911, to January, 1912, 1, 171. 



Monthly means at Framheim, I, 172. 

 Monthly means at MeMurdo Sound, with yearly 

 values, I, 167. 



Monthly means at Hut Point, Cape Evans, Cape 

 Adare, and Framheim, III, 218. 



Monthly Variation at Hut Point, Gauss Station and 

 SIIOM- Hill, corrected for normal variation in 

 MeMurdo Sound, I, 199. 



Non-periodic changes at MeMurdo Sound, absolute 

 values in four years, average dillnvn.r between 

 highest- and li\\e-t in each month for four \ 

 mean difference between daily maximum and 

 minimum, highest monthly mean in ! 

 li IH-I-.-, I monthly mean in f'" 



iM-tween hL'iu-st and lowest monthly mean, and 

 a\erage departure of monthly mean from smoot lied 

 normal, monthly values, I, 184. 



831 



