^18 METEOROLOGICxVL OBSERVATIONS. 



Sun, and corresponding notes were made on tlie Solar light, i,e' 

 on the amount of cloud obscuring the Sun. 



Discussion of Winds. 



The mean true direction of the wind is from the eastward. In 

 the month of June the Avind veers round to the west of south. In 

 winter it is E.N.E. (true), and in summer S.E. by S. 



The S.W. and N.W. winds (magnetic), i.e., S.S.W. and E.S.E. 

 (true), blow most violently, the mean velocity being 10 miles an 

 hom^ the average velocity of the other winds being about five 

 miles an hour. 



The calms greatly predominate, there being more hours of calm' 

 than hours of wind, a circumstance quite characteristic of the 

 locahty. 



All gales come from the S.W. in the summer, and the S.E. 

 (magnetic) in winter, i.e., over South Greenland from the true 

 E.S.E. in summer, and from the true N.N.E. in winter. 



Note. — Gales appear to come with the warm winds. Snow 

 comes either from the N.W. (magnetic), i.e., from the upper part' 

 of Baffin's Bay, or from the S.E. or S.W. i.e., from between 

 N.N.E. and E.S.E. (true), or from the direction of the 

 Spitzbergen Sea. 



Barometric Observations. 



In the diurnal changes of pressure there is an increase from' 

 2 p.m. (rather rapid) until the maximum is reached at 10 p.m. ; 

 then the pressure diminishes until 3 a.m., remains pretty steady 

 until 9 a.m., and then gradually diminishes to a minimum at 1 p.m. ; 

 the average amount of this change being about '01 of an inch. 



There are much greater irregularities both in j)ressure and 

 temperature in winter than in summer. There seems to be very 

 little, if any, change of the barometric pressure caused by the fall 

 of snow. 



During S. and S.W. (magnetic) winds the barometer rises above 

 its mean value. For other winds it is depressed. 



In the annual changes there is a maximum in April, then 

 a fall (rather rapid) until August, then a gradual rise until 

 November, after which there is little change until February, 

 followed by a sharp rise to the maximum in April. 



3. Dr. Hayes' Meteorological Observations in the Arctic 

 Seas. " Smithsonian Contributions," vol. 15, p. 167. 



The Temperature. 



Port Foulke. — The annual fluctuations of the temperature of the 

 air are exceedingly regular, being lowest at the end of January 

 and increasing very uniformly until July, and then diminishing as 

 uniformly from July until January ; the range being from — 26° F. 

 to 4-42° F. 



The diurnal fluctuation of temperature through the year is a 

 minimum at 2.30 a.m. and a maximum at about 2.30 p.m., passing 



