METEOROLOGICAL RESULTS 



OF THE 



SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 



By Egbert C. Mossman, F.R.S.E. 



The meteorological observations talven on board the " Scotia " conaprised the pressure, 

 temperature, and humidity of the air, the direction and velocity of the wind, the amount, 

 form, and motion of the clouds, the amount, direction, and temperature of the sea-surface, 

 and the quantity and nature of the precipitation. Other observations, such as the 

 amount of solar and terrestrial radiation, thickness of the rainband in the spectrum of 

 sunlight, and phenomena of occasional occurrence, were also carefully noted. 



The period covered by the observations extends from 17th November 1902 to 15th 

 July 1904. The scheme of work comprised the taking of eye observations at every hour 

 night and day during the time the Expedition was south of 30° S., while at other times 

 readings were usually made every four hours. When in port fewer observations were 

 taken. 



The instruments were verified at Kew Observatory before the departure of the 

 Expedition, and as regards the barometers and thermometers, frequent inter-comparison 

 was made. Many of the instruments were ordered, and some lent by the Meteorological 

 Council through its Secretary, Dr W. N. Shaw, F.R.S., who thus rendered valuable aid 

 in the equipment. Special mention is also due to Mr John Anderson for supplying 

 the kites, motor engine, and other tackle connected with the aerial work, and for his 

 personal superintendence during the kite flights at Leadburn and on board the steam 

 yacht " Mermaid " before our departure. Our indebtedness to the Directors of the 

 Millport Marine Station in this connection must also be mentioned. 



During the Expedition the observations were organised and superintended by Mr 

 Bruce and myself, and the readings made by the Leader, the Captain, and the scientific 

 staif. After my return in 1905 from Laurie Island, South Orkneys, where I remained 

 for an extra year in charge of the Argentine party brought by the " Scotia," the journals 

 and other data were put at my disposal in order that the present memoir might be 

 prepared. In this connection I have to tender my best thanks to Mr James Miller 



VOL. IL a 



