40 SEVENTH REPORT—1837. 
Time of vibration. Intensity. 
Station. g As a dipping-needle. 
2 Horizontal.| “4 the ‘x th Paris = 1°000. Baa” 
station, Paris. . 
PATIG. satcaceneaseneaad 1019-75 6177 617-7 ||1:000 
Pedechepssnacancee 1009-93 6117 611-7 ||1:000 + 1-000 | 1:348 
Sbsatteiens odes a 525-05 318-0 318-0 |!1-000 
Teneriffe .......0000+ 450°75 319-0 318-0 |}0°9942 1-340 
Rio de Janeiro...... 775-9 763°1 620-0 ||0°6602 
nytt 402-20 | 395-6 | 318-0 ||0-6465 
937-0 | 7451 | 620-9 llo-6945 
4779 | 3800 | 318-0 |\0-7005 
9120 | 689-7 | 6228 ||0-8155 
913-0 690°5 622-3 ||0°8139 } 0°813) 1-096 
467°8 353°8 318-0 ||0°8082 
800-4 60771 624-0 ||1:057 
767:27 | 7546 616-7 ||0°6679 ; 0-658) 0-887 
}o-eo7 0-945 
Baie des Chiens- 
MAriNs ...se+eee } 1-054 1-421 
Sn 802°5 608°6 624-2 ||1:052 
We Pinon Fe os as yess 7285 667°7 624:2 ||0-8741] o, ; 
poet SEs 729-3 | 6689 |. 6245 ovis f° 8738/1177 
Ile Rawak ......... 721-6 710-1 625-1 ||0°7750 
cated 722-7 | 7ill | 6255 07736 (0774 1-044 
749:15 | 7393 | 626-9 |0-7181 
Iles Mariannes 
799 | ya08 | eae losia ¢ 0718/0868 
Te Mow? ...20: Pe 
7928 | 685°3 | 627-9 |[0°8395 1 o.ciql 4. 
ends 793-0 | 685°5 | 6285 o-8io1 ¢°840 Liss 
Sydney ssssccssssscons 846-4 | 572-4 | 629°5 ||1-210 
Ba | erai-| e308 (Lai ¢ 2210 | 1681 
Sea | tare. Iheaco-lvor (ieee 
7909 is 633-6 (o-eens ¢ 0°652| 0-892 
10453 | 6363 | 6563 [1-000 $1000 | 1-348 
Seen ee eeeeenees 
Tles Malouines 
Rio de Janeiro 
ONADNBDNIBDNBDNBDNONWND NS OCmnNo mn CHNOORDN 
Senate ne eeeseeseee 
It would have given me great satisfaction had I been enabled 
to have included in this publication the observations made in In- 
dia by Capt. Jules de Blosseyville,in whose untimely death within 
the Arctic circle, now, I fear, but too certain, science has sus- 
tained the loss of an officer who gave full promise, had he lived, 
of becoming one of the most accomplished navigators of the 
age. In the last letter which I received from him, dated at 
Toulon in 1830, he thus expresses himself in regard to his ob- 
servations of the intensity :—‘‘ Toulon ayant été, et pouvant de- 
venir encore le point de départ de plusieurs expeditions scien- 
ifiques, il sérait utile, je pense, d’y connoitre d’une maniére 
exacte la valeur de l’intensité magnétique, et je me chargerais 
laser 
ee ee 
et BE MEO 
we es ae 
a . S 
