TABLE 64. 



METEOROLOGICAL DIARY KEPT AT CAPE AD ARE, FEBRUARY 28TH, 1911, TO 



DECEMBER 31sT, 1911. 



FEBRUARY, 1911. 

 February 28th, 1911. 



Between 8 and 9 this morning, two banks of clouds, the lower one of Nimbus and the upper 

 one of Cirrus, Cirro-stratus and Cirro-cumulus, rose in the N.W. and gradually spread 

 over the sky towards the S.E. 



At 8.30 we noticed a pronounced mock sun to the left of the sun, with the spectrum colours 

 well denned from blue to red towards the sun. Another mock sun was for a few minutes 

 recognisable to the right of the sun but was never very definite. These were mock suns 

 of the halo of 22 and in the light of what I afterwards read in the Observers' handbook, 

 it is interesting to state that while the red to green colours were quite bright, the blue 

 was equally bright, if not brighter, than the other colours, and I believe that I saw a faint 

 violet ring outside the blue. 



The halo of 22 itself was not noticeable, except in the immediate neighbourhood of the mock 

 suns themselves. 



Warning and Sir George Newnes Glaciers are clear. 



At about 5.45 p.m. a southerly wind sprang up. Gusts of about force 3 to 4 were interspersed 

 with 5 minute intervals of calm. At 6 p.m. I took an extra series of observations to mark 

 the beginning of the wind. 



All day, up to this, has been calm with light southerly airs. Temperature very constant at 

 about 24 F. 



7 p.m. The southerly wind has continued off and on until about 6.45, but now a light northerly 

 wind is blowing. A little snow has fallen here, and both N. and S. of us it appears as if 

 the snow were much heavier. 



Warning Glacier is obscured by snow. 



10.30 p.m. Going to turn in. The wind which was S.E. at the 10 o'clock observation is now 

 about force 2 from the N.E. 



MARCH, 1911. 

 March 1st, 1911. 



1 p.m. During the forenoon I have been fixing up the Solar Radiation Thermometer (M.O. 

 1004) and a Minimum Spirit Thermometer within an inch of the ground for the Terrestrial 

 Radiation (M.O. 3456), and the Aluminium Sledging Thermometer (No. 57), instead of the 

 Dry Bulb which is still missing. 



Cumulus has been banking up to the N. of us and spreading over the sky to the S., 

 arid on the Northern horizon it has become much denser until it is practically Nimbus. 



8.30 p.m. Clouds have remained very steadily piling up from the N. until the sky has become 

 almost completely covered with dense Cumulus. The temperature has remained almost 

 constant all day and the wind has been practically nil. 



The Terrestrial Radiation Thermometer bulb is about an inch above the ground level, 

 but the ground is not covered with snow ; that portion immediately adjacent to the screen 

 consists of the usual mixture of pebbles and guano, so that this will complicate the 

 temperatures. 



When we get a good light I will take photographs of the screen back and front showing 

 the position of the various instruments. 



470 



