200 
REVUE DES QUESTIONS SCIENTIFIQUES. 
le P. Perry. Les derniers volumes contiennent un résumé des 
observations solaires. 
Magnetic Survey of France, 1868 et 1869: Phii.os. Transact., 
t. CLX, 1870; t. CLXII, 1872; Proceed. of the R. S., t. XX 
(S. J. Perry et W. Sidgreaves); Letters and notices, t. VII, 1871. 
Voici les stations où le P. Perry détermina les éléments magné- 
tiques : En 1868, Paris, Laval, Brest, Vannes, Angers, Poitiers, 
Bordeaux, Abbadia. Loyola, Bayonne, Pau, Toulouse, Périgueux, 
Bourges, Paris et Amiens. En 1869, Paris, Reims, Metz, Stras- 
bourg, Issenheim, Dole, Dijon, Lyon, Avignon. Marseille, Mont- 
pellier, Grenoble, N.-D. de Myans, Mongré, Saint-Étienne, 
Clermont, Moulins, Paris, Douai et Boulogne. 
Magnetic Survey of Belgium, 1871 ; Philos. Trans. t. CLXIII, 
1873. 
Pesults of seven years observations of the dip and horizontal 
force ,at Stonylmrst College observatory, from A prit 1863 to Mardi 
1870; Philosopii. Trans., t. CLXI, 1871. 
Note on a simultaneous disturbance of the barometer and of the 
magnetic needle ; Proceed. of the R. S., 1876, n° 172. 
Magnetic observations tnade at Stonghurst College observatory , 
from April 1870 to Mardi 1876; Proceed. of the R. S., 1876, 
n° 175. 
Magnetic observations taken during the transit of Venus expé- 
dition to and from Kerguelen island; Proceed. of the R. S., 1878, 
n" 1 85 . 
Déport of the Météorologie of Kerguelen island, published by the 
authority of the meteorological Council, London 1879; analysé 
dans Revue des questions scientifiques, t. VIII, p. 6 o 5 . 
Preliminary results of a comparison of certain simultaneous 
fluctuations of the déclination at Keiv and at Stonyhurst during 
the years 1883 and 1884, S. J. Perry and Balfour Stewart; Pro- 
ceed. of the R. S., 1 885 , n° 241. 
2. Passages de Vénus : 
The approaching transit of Venus ; The Moxth, t. XVIII, 1873. 
The préparations for the transit of Venus ; The Month, t. XXI, 
1874. 
Notes of a voyage to Kerguelen island to observe the transit of 
Venus , Dec. 8, 1874; The Month, t. XXV, t. XXVI, i 8 7 5 . 
Manila photographs of the transit of Venus , Dec. 8, 18~1 ; 
Monthly Notices, t. XXVI, 1876. 
On the phenomena exhibet by a planet in its transit across the 
