89 



11. — Meteorological Observations taken at Cassiobitey House 



FROM JaNTTARY TO APRIL, 1876. 



By the Eight Honourable the Earl of Essex. 

 [Read 9th May, 1878.] 



Abstract.* 



January. — The mean pressure of the atmosphere was 30"26 ins. 

 the highest reading, 30-60 ins. on the 15th; the lowest, 29-75 ins. 

 on the 21st ; range, 0'85 in. 



The mean temperature of the air was 31°-8 ; the highest, 46° on 

 the 1st and 31st; the lowest, 12"" on the 12th; range, 34°: the 

 mean high day temperature, 37°-2; the mean low night temperature, 

 26^-5 ; mean daily range, 10°-7. The highest temperature in the 

 sun was 57° on the 24th. 



The direction of the wind was N.E. on 8 days, E. on 6, S.E. on 

 2, S. on 8, S.^y. on 5, and W. on 2. Easterly winds mostly pre- 

 vailed to the 18th, then S.W. followed by N.E., and southerly for 

 the last week. 



Rain fell on 6 days, and snow on the 8tli and 18th; the total 

 amount of rain and melted snow being 0-88 in., and the greatest 

 fall in one day 0-50 in. (as rain) on the 22nd. 



The temperature sank to below freezing-point on 6 nights : 12 

 days were foggy. 



February. — The mean pressure of the atmosphere was 29-84 ins. ; 

 the highest reading, 30-30 ins. on the 3rd; the lowest, 29-40 ins. 

 on the 19th; range, 0-90 in. 



The mean temperature of the air was 37°-3 ; the highest, 55° on 

 the 22nd ; the lowest, 16° on the 12th ; range, 39° : the mean high 

 day temperature, 43°-7 ; the mean low night temperature, 30°-9 ; 

 mean daily range, 12°-8. The highest temperature in the sun was 

 67° on the 29th. 



The direction of the wind was N.W. on 4 days, N.E. on 6, E. 

 on 2, S.E. on 2, S. on 1, S.W. on 7, and W. on 7. North- 

 easterly winds mostly prevailed for the first half of the month, and 

 south-westerly for the last half. 



Eain fell on 13 days, and snow on the 5th, 6th, and 14th, the 

 total amount of rain and melted snow being 2 15 ins., and the 

 greatest fall in one day 0-50 in. (as snow) on the 14th. 



The temperature sank to below freezing-point on the 13th only. 

 Fog prevailed on 5 days. 



March. — The mean pressure of the atmosphere was 29-60 ins. ; 

 the highest reading, 30-10 ins. on the 20th; the lowest, 28-80 ins. 

 on the 12th ; range, 1-30 in. 



* This summary of the Earl's daily ohservations is in continuation of that of 

 the previous eijjht months' observations published in the 1st Volume of the 

 ' Transactions ' (p. 132). The means, etc., are deduced as before.— Ed. 



VOL. II. — PT. III. 7 



