[ ••i'-ll ] 
IX. On the Toted Solar Eclipue of August 29, 188G. 
Bg Captain L. Darwin, li.E., Arthur Schuster, Fk.D., F.B.S., and 
E, Walter Maunder. 
Keceived January 28,—Read February 14, 1889. 
[Plates 9, 10.] 
Contents. 
Page. 
I. Origin of the Expedition and General Preparations. By Gapfain Darwix, 
A. Schuster, and E. W. Maunder ..291 
II. Preparations for the Eclipse at Prickly Point. By Captain Darwin and A. Schuster 293 
III. Totality at Prickly Point. By Captain Darwin and A. Schuster .296 
IV. On the Accuracy required in Adjusting an Equatorial for Photographic Purposes 
during a Total Solar Eclipse. By Arthur Schuster .297 
V. Results of the Photographic Camera at Prickly Point. By Arthur Schuster . . 302 
VI. The Coronagraph. By Captain Darwin .306 
VII. The Prismatic Camera. By Captain Darwin .318 
VIII. The Spectroscopic Cameras at Prickly Point. By Arthur Schuster .821 
IX. Photographic Results obtained at Carriacou Island. By E. W. Maunder . . . . 342 
X. Description of the Eclipse and Drawing of the Corona. By Captain Irwin 
C. Mating .346 
XI. On the Photographs of the Corona obtained at Prickly Point and Carriacou Island. 
By W. H. Wesley .347 
I. Origin of the Expedition and General Preparations. By Captain 
Darwin, Arthur Schuster, and E. W. Maunder. 
An expedition for observing the Eclipse of the Sun of August, 1886, was organised 
and sent out by the Boyal Society, the necessary funds being obtained partly by a 
special vote from the Treasury, partly from the annual grant to the Bo} al Society, 
and partly from the Society’s private funds. A Committee appointed by the Council 
of the Boyal Society discussed the principal questions to which observers Avere to 
direct their attention, and distributed the available instruments amongst them. It 
was also decided that, as far as the scientific part of the work was concerned, the 
observers should be independent of each other, and report separately to the Society ; 
but that they should elect one of their members as chief, to represent them in all 
2 P 2 10.12.89 
