PREPARATIONS FOR THE TRANSIT OF YENUS. 
247 
of those among them which really are Halleyan as well as 
Delislean, failed to notice that both ingress and egress can be 
observed, the strange charts illustrating his paper not suggest- 
ing in any way that such is the case. Eight stations have been 
provided for by the Home Grovernment, while one is now provided 
for by the Indian Grovernment. Originally five stations were 
to have been occupied, and solely for the application of 
Delisle’s method ; and the region in North India, for which the 
Indian Grovernment will provide, had been overlooked altogether 
(Monthly Notices, vol. xxx. p. 37), being strangely omitted 
from the charts illustrating Sir Gr. Airy’s paper. 
It is well to note, first, that ample provision has been made 
for the application of Delisle’s method. No less than three 
stations will be occupied in the group of the Sandwich Islands, 
where Captain Tupman (the head of the entire enterprise) will 
be stationed. Here photography will be applied specially to 
the determination of the moment of ingress, by a contrivance 
of Janssen’s (improved by De la Rue) enabling the photo- 
grapher to take sixty successive pictures of the ingress. Under 
Captain Tupman’s command will be Lieutenants Ramsden and 
Noble, and Messrs. Johnson, Forbes, and Barnacle. The obser- 
vation of accelerated ingress has been well provided for, 
especially as some of the Halleyan stations in Japan and the 
north-east of Asia are excellent for this phase also. 
Retarded ingress will be observed at Kerguelen’s Land and 
Rodriguez. According to the published statements there will 
be two stations on Kerguelen’s Land, but Fr. Perry, who is 
chief in this region, has power to assign one party to Heard 
Island if a landing shall be found to be practicable. The 
three stations here are all Halleyan as well as Delislean, 
the whole transit being most favourably visible. It is well, 
therefore, to note that ample provision has been made for 
applying Halley’s method, as well as for photographing the 
whole progress of the transit. The observers under Fr. Perry 
will be Fr. Sidgreaves, Lieutenants Corbet, Groodridge, and 
Coke, and Mr. J. B. Smith. At Rodriguez, Lieutenants 
Neate and Hoggan, and Mr. C. E. Burton, will be the ob- 
servers. 
Accelerated egress will be observed at Christchurch, New 
Zealand, by Major Palmer and Lieutenants Darwin and Craw- 
ford. This station, like the stations for observing retarded 
ingress, is Halleyan also, and is now well provided for as a 
station for observing the whole transit. 
Retarded egress will be observed at Alexandria by Captains 
Browne and Abney, and Mr. S. Hunter. 
The names of the observers at Peshawur, in North India, 
have not been published, but it is known that the whole 
