MAGNETIC DISTURBANCES AT SEVERAL OBSERVATORIES. 
139 
Table IV.—Changes in Horizontal Force on June 25, 1885. 
At 2.10 p.m. 
(G.M.T.). 
At 3 p.m. 
At 5.10 p.m. 
At 5.30 p.m. 
At 6.20 p.m. 
St. Petersburg .... 
•0075 
- -0070 
•0005 
- -008 
- -010 
Stonyburst. 
•0088 
- -0066 
•Oil 
- -on 
- -009 
Wilhelmshaven. . 
•0090 
- -0075 
■0062 
- -009 
+ -on 
Utrecht. 
•0056 
- -0056 
•0056 
- -003 
- '006 
Kew. 
•0060 
- -0050 
•0080 
- -008 
- -oio 
Vienna. 
•0055 
- -0050 
•0033 
- -003 
- -005 
Lisbon. 
•0027 
- -0022 
•0033 
- -002 
- -003 
San Fernando .... 
•0012 
- -0012 
■0025 
- -ooi 
- -002 
Colaba. 
•0015 
- -0015 
•0010 
- -ooi 
Batavia. 
•0014 
- -0014 
•0010 
- -ooi 
- -001 
Melbourne. 
•0037 
- -0022 
•0030 
- -003 
— -004 
There is some little uncertainty as to the values at the four last stations in this 
table, because the measurements to be made are very small. This reduces the 
number of observatories at which the Gaussian analysis can be applied with 
advantage to too small a number to determine the Gaussian coefficients for this 
storm. 
