XXXIV REPORT—1857. 
Navy, for the assistance afforded to Dr. Hochstatter, who writes that he had 
commenced his observations:—Dr. Hochstiatter’s letter is dated Gibraltar, 
21st May, 1857. 
In consequence of an application from the Hydrographer of the Admiralty, 
Dr. Baikie and Lieut. Glover, who have recently sailed on an expedition to 
Africa, were furnished with Magnetical Instruments, whose Constants had 
been previously determined at the Observatory. Dr. Baikie and Lieut. Glover 
visited the Observatory, when detailed instructions were communicated to 
them by Mr. Welsh, as to the practical use of the instruments. 
Application having been made to the Royal Society by Her Majesty’s 
Secretary of State for the Colonies, relative to a supply of Magnetical In- 
struments for an expedition to British North America, under the direction 
of Mr. Palliser, Lieut. Blakiston, R.A., who accompanies the Expedition, 
attended for some time at the Observatory for the purpose of manipulating 
with the Magnetical Instruments, which have been prepared under the direc- 
tion of Mr. Welsh for the use of the Expedition. The Constants of these 
instruments were determined as in the other instances already referred to in 
this Report. 
At the request of the Council of the Royal Society, Mr. Welsh has pre- 
pared the Magnetical Instruments required in the North Polar Expedition, 
which has been fitted out at the expense of Lady Franklin: the cost of pre- 
paration of these instruments is defrayed by the Royal Society. The instru- 
ments themselves have been supplied from Major-General Sabine’s establish- 
ment at Woolwich. 
General Sabine having communicated to the Committee that £200 had 
been placed at his disposal by the Admiralty, for the purpose of conducting 
the Magnetical Survey of Scotland, in connexion with the general Magnetic 
Survey of the British Islands, as recommended at the last Meeting of the 
Association, the Committee have arranged that Mr. Welsh shall undertake 
such survey in the course of the present and following summer. 
Sir James Clark Ross has already commenced the Survey of England, 
taking Kew as his base station. 
A new method, proposed by Dr. Lloyd, of determining the absolute total 
magnetic force by means of the Dip Cirele, will be employed in this Survey. 
Dip Circles adapted for this method have been supplied to Sir James C. Ross 
and Mr. Welsh, also to Lieut. Blakiston for his Survey in North America. 
PHOTOHELIOGRAPH. 
On the 20th of May, 1854, Benj. Oliveira, Esq., F.R.S., placed the sum of 
£50 at the disposal of the Council of the Royal Society, to he appropriated 
during that year in any manner the Council might consider most in harmony 
with the interests of Science. Mr. Oliveira further stated, that he might pro- 
bably in future years offer a similar sum if the mode of its disposal appeared 
to him eligible ; and an application having at the same time ocen made by 
the Kew Committee for the sum of £150, in order to erect a Photographic 
Apparatus for registering the position of the spots in the Sun’s disc, as sug- 
gested by Sir John Herschel, the Council of the Royal Society devoted to 
this purpose the donation of Mr. Oliveira, and proposes, should it be con- 
tinued, to apply it for the next two years in replacement of the sum of £100 
which the Council in the mean time advanced from the Donation Fund of 
the Royal Society, in order that the undertaking might not be delayed. This 
arrangement was approved by Mr. Oliveira, and the apparatus has, under the 
direction of Warren De la Rue, Esq., F.R.S., been completed by Mr. Ross 
at the cost of about £180. 
