212 



MR. J. BAXENDELL ON THE 



Table II. 





J3 

 1 

 



t 



1 



00 



NO 







T 

 00 



,4 



M 

 1 







l-l 



l-H 



NO 



l-l 

 1 



00 



l-H 

 1 



NO 





 Cl 



1 



00 



l-l 







i 





1859 



i860 

 I86I 

 1862 

 1863 

 1864 

 1865 



11-4 

 i8-3 

 i6-i 

 187 



21*2 



13-9 

 14-1 



io'4 

 i8-6 

 17-3 

 17-2 



20'2 

 14-3 

 137 



17-6 

 14-9 

 i6-5 

 i8-5 

 12-9 

 11-4 



8-4 

 177 

 11*2 

 14- 1 

 i6-8 

 IO-8 

 IO-6 



9-1 

 15-9 

 117 



i3"9 



17-5 



II'O 



107 



8-5 

 17-1 



9-1 

 14-2 

 16-9 

 117 

 xi-o 



8-2 



15-0 

 11-4 

 14-1 



I7"6 

 II"2 



IO-5 



14-9 



II'O 



I4'2 



i7'o 



10-5 



9*9 



7-8 

 14-8 

 11-9 



14-2 



i6-3 



9'5 

 lo-o 



7*4 

 15-1 



12-3 



14-1 



16-3 

 9-6 



IO-8 



17-6 



12-8 



i6-2 



185 



ii'3 



I2'9 



9-0 

 19*2 



i6-6 



177 

 20-9 



12-6 



13*9 



i6-8 

 I3-0 



15-4 

 i8-i 

 II-6 

 11-6 



Hesolving tlie directions in each of the columns of Table 

 I. into their rectangular co-ordinates A and B^ in the 

 direction of the meridian and at right angles to it, by 

 using the corresponding velocities in Table II. and taking 

 the means of the values of A and B, we obtain the mean 

 direction 6 for the hour indicated at the head of the column,, 

 fi'om the equation 



B 



tan^ = 



A 



and the corresponding mean velocity v from the equation 



A 



v=. 



cosO' 



The mean directions and velocities thus obtained are 

 shown in Table III. 



Mean Mean 



direction, bi-horary. 

 o , velocity. 



221 43 11*84 



222 29 11*58 



221 57 11*55 



224 10 ii'64 



224 5 i3'32 



227 43 1478 



In Table XII. of the results of the ^ Radcliffe Observa- 

 tions' the mean directions are given for the hours o h., 2 h., 

 4h.^ &c. ; but in Table XIII. the velocities are given for 







Table III. 





Mean 



Mean 







direction. 



bi-horary 





h. 



i 



velocity. 



h. 



.. 



.... 227 41 .. 



.... 15-58 



12 



2 .. 



.... 229 46 .. 



•••• 15-35 



14 



4 •• 



.... 227 52 .. 



.... 1383 



16 



6 .. 



.... 226 .. 



... 12*o8 



18 



8 .. 



.... 221 33 .. 



.... I2"02 



20 



10 .. 



220 27 .. 



.... 1x74 



22 



