Prof. E. Loomis on the Aurora of 1859, 327 
more northerly stations. I have made a careful comparison of 
these observations for the purpose of determining whether these 
movements of the magnetic needles were strictly simultaneous. 
one asring catalogue exhibits a list of those cases which 
afford the most satisfactory data for comparison, viz., when there 
was a well marked nares ora or minimum value of the magnetic 
declination, and when this maximum or minimum value was o 
short duration. In the follsitig list, all the dates are expressed 
in the mean time of Gdttingen. 
Observed deflections of the horizontal magnetic needle, 
qhm 
1. 1836. Aug. 17. 750, Maximum at Upsala, Berlin, Gottingen, Leipsic and 
unich, 
47 55, Maximum at Hague. 
2. 1836. Aug. 17. 9 50, Max. at Upsala, Berlin, Hague, Gittingen, Leipsic and 
Munich, 
3. 1836. Aug. 17. = = ae ref Ail ge Leipsic and Munich, 
Min, at t Ber n, Hague and Gottingen. 
4. 1836. Aug. 14. 10 9 Max. at Beri, Leipsic and ao 
0 35, Max. at Mop ago ttingen. 
5. 1836. Sep. 24, . 55, Max. at Upeala, Be oe Gattingen, Breslau, Leip- 
8 ae, Meee Munich 
- 1836. Sep, 24. = 0, Min, g . 
; a ys Upsala, Berlin, Gottingen, Breslau, Leipsic, Mar- 
* g, Munich and Milan. 
+ 1836. Sep. 24.18 40, tay ak Upsala, Berlin, Hague, apo Breslau, 
8 Leipsic, ole. ? Munich and Milan. 
- 1836, Sep. 24.18 50, Min. at Upsala, Be ie dee a Gottingen, Breslau, Leip- 
sic, Marburg an 
9 18 55, Min. at Milan 
- 1836. Sep. 24.19 0, Max. at Upsala, Be lin, Hague, Géttingen, Breslau, 
Lei ae c, Marburg, Marich and Milan. 
10. 1836, Sep. 24.21 10, Max. at U ee : ec 
5, Max. Moin i fie me Géttingen, Breslau, Leipsic, 
Muni 
21 20, Max. at 7 faves 
11. 1837. Jan. 28. 855, Max. at U Altona, Berlin, Géttingen, Breslau, 
12 Freiber urg, 1 2 , 
- 1837, Jan. 28. 9 80, Min, at Upsala, Altona, Berlin, G6 ‘eigenen on 
18. 1837, Jan, 28, 12 30, ‘er at Upsala, Altona, Berlin, Breda, Gottingen, Leip- 
sic, Breslau, Freiberg, Marburg, Augsburg. Munich 
an. 
14. 1837, Jan. 28. 21 30, fice at Upsala, Altona, Berlin, Breda, a 
sic, Breslau, Freiberg, Marburg, Augsburg, M 
Milan 
15. 1887. May 98. bd wax . Copenhage 
Uyeala, Be Berlin, Breda, Gottingen, Breslau and 
9 55, at Munich and Milan. 
10 0, Max. at Leipsic. 
16 1887. July 29. 6 20, Max. at Petersburgh. 
6 35, Max. at Upsala and Co ¥en nhagen. 
6 40, Max. at Berlin, Breda, éttingen, Breslau, Leipsic, Frei- 
Mar Munich and Milan. 
ber; 
17, 1837, July 29, 7 0, a 4 Peters 
7 15, Min, at Upsala, Copenhagen and Breslau. 
