198 



MR ALEX. BUCHAN ON THE STORMS OF WIND WHICH OCCURRED 



no longer visible, having probably left Europe by the North Cape, while the second 

 had advanced to the north of Holland. At 9 a.m. of the 4th (Plate XXL), it had 

 advanced to Copenhagen, had greatly diminished in area, and the central de- 

 pression was five-tenths less than on the previous morning ; and at 9 p.m., the 

 observations at Christiania, Kiel, and Konigsberg show that the atmospheric 

 equilibrium was restored, and the storm consequently had died out. 



Most of the storms left Europe by the North Cape or the north-east of Russia ; 

 but two of them (Storms III. and X.) wasted away and died out before reaching 

 Russia. 



Rate at which the Storms travelled. 



The distance between the points indicating the centre of the barometric 

 depression, or the centre of the storm on two consecutive days, could be deter- 

 mined on twenty-one occasions, which are given in the following table : — 





For Twenty-four 



Distance travelled 





No. of Storm. 



Hours, ending 



by Storm iu Eng. 



Rato per Hour. 





8 A.M. 



miles in one day. 





Storm I. . . . 



Oct. 29 



580 



24 



„ II- 









30 



600 



24 



„ II. 









31 



420 



18 



„ II. 









Nov. 1 



400 



17 



„ II. 









2 



420 



18 



„ HI 









2 



400 



17 



„ HI. 









3 



430 



18 



„ HI. 









4 



510 



21 



„ iv. 









5 



700 



29 



„ iv. 









6 



470 



20 



„ iv. . 









7 



360 



15 



„ iv. 









8 



470 



20 



,. v. 









11 



260 



11 



„ v. 









12 



390 



16 



„ VII. . 









22 



460 



19 



„ VII. . 









23 



560 



23 



,\ ix. 









Dec. 2 



500 



21 



„ IX. . 









3 



390 



16 



„ ix. . 









4 



425 



18 



„ XI. 









17 



485 



20 



„ XL . 









18 



460 



19 



Means, . 





461 



19 



Hence, the mean distance the storms travelled each day was 460 miles, 

 being at the rate of 19 miles an hour. The least distance was from the 10th to 

 the 11th, being only 260 miles, or 11 miles an hour. It was on this occasion 

 that Storm V. retrograded toward the S.W., and the distance given is in all like- 

 lihood too small, it being probable that it did not begin its retrograde motion till 



