546 

 P. 



Potential, electrical, 521. 



abnormally high, associated with drifting snow, 522. 



,, and the aurora, 529. 



,, annual (seasonal) variation, 526. 



at 15 feet above the ground, 528. 



,, diurnal variation, 525. 



Precipitation, 12, 472. 



relation to evaporation, 475. 



Pressure and winds, general considerations, [x]. 



barometric, 367. 



annual variation, 477. 



n comparison of mean values at Winter Quarters and other Antarctic stations, 476. 



diurnal Fourier coefficients, 482. 



variation, 480. 



range of, 482. 



,, relative values in high southern latitudes, 477. 



seasonal variation, 479. 



yearly mean, 476. 



Psychrometer readings, 471. 



E. 

 Badiation, solar, 469, 514. 



comparison with Madras, 514. 



terrestrial, 463, 466. 

 thermometers, 8. 

 Rain gauge, 12. 

 Recording instruments, 8. 

 Ross, Sir J., 417, 418, 420, 421, 422. 

 ROYDS, Lieutenant C., R.N. In charge of meteorological observations, [vi]. 



,, Notes on the meteorological instruments and their exposure, 5. 



Observations on sledge journeys, 285, 288, 292, 295, 323, 352, 423, 434, 438, 445, 440. 



S. 

 " Scotia," 413, 419, 441. 



Scottish N.A. steamship, 414, 415, 441. 

 wind directions, 493. 



Weddell Sea, 450, 451. 



SCOTT, Captain R. P. Journey to south, 438. 

 west, 448. 



White Island, 423. 



Observations on sledge journeys, 284, 308, 343. 



SCOTT, R. H., F.R.S., [v], [x]. 



Scottish National Antarctic Expedition, 414, 415, 417. 

 SCOTT'S journey to the south, discussion of pressure observations, 439. 

 Seasonal variation, electrical potential, 526. 

 ,, pressure, 479. 



,, sunshine, 513. 



,, temperature, 463. 



,, wind direction, 487. 



velocity, 497. 



SHACKLETON. Observations, 308. 

 SHAW, 478. 



Siberia, isobars on the coasts of, 440. 

 SKELTON. Observations, 298, 325, 328, 343. 



,, of atmospheric electricity, 519. 



Sledge journeys, journal of observations, 273. 



wind direction, 488. 



Snow gauge, 12. 

 Snow Hill Island, monthly summary of 8 a.m. observations ; discussion of observations, 426, 433, 437, -141. 44:>, 444, 447. 



