Vll 



air which passed over the station from any other point was fourteen 

 thousand five hundred and forty-one miles from W.N.W., and the wind 

 blew from that direction seven hundred and sixty-three hours, or 

 thirty-one days nineteen hours; therefore the winds from the S.S.E. 

 during the year 185*2 greatly prevailed over the winds from any other 

 direction. Column 6 shews the average hourly velocity of the air for 

 each of the sixteen points of the compass; it will he seen that the 

 N.N.E. wind is the lightest wind, the mean hourly velocity being only 

 five miles and eight-tenths of a mile, and that the N.N.W. wind is the 

 strongest wind, the average velocity from that direction being nineteen 

 miles and one-tenth of a mile an hour. Column 8 shews the amount of 

 rain which fell during the time that the wind blew from each point, and 

 column 10 the number of hours occupied in falling; column 12 shews 

 the average hourly rate at which rain fell when the wind blew from each 

 point; and it will be seen that with a south wind the mean hourly rate 

 at which rain fell was only twenty-six thousandths of an inch, but with 

 a N.N.W. wind rain fell at the average rate of eighty-nine thousandths 

 of an inch an hour. Columns 3, 5, 7, 9, and 11 represent respectively 

 the per centage of the results given in columns 2, 4, 6, 8, and 10. 



The sums of all the changes in the direction of the wind for the year 

 were, in the order N. E. S. W. N. twenty-eight revolutions, and in the 

 order N. W. S. E. N. twelve revolutions ; therefore the excess of the 

 direct motion over the retrograde motion was sixteen revolutions. 



The following results shew the comparative violence of the four 

 heaviest gales of wind which passed over the observatory during the 

 year 1852. 



IS 



n 



Jan. 4 



9 



Dec. 25 



„ 27 



Pounds. 

 28 

 29 

 42 

 42 



5ia.m. 

 3 * 

 4} . 



7 „ 



Miles. 

 53 

 62 

 70 

 71 



5 (fe 6 a.m. 



4 & 5 » 



4 <S; 5 » 



8 <fc 9 . 



W.N.W. 



W.N.W. 



W.S.W. 



S.W. 



Liverpool Observatory, 

 May 27th, 1853. 



JOHN HARTNUP. 



