1898.] on the Becent Eclijpse. 811 



Maunder, Mr. Thwaites and Mr. Evershed ; and tlie Viceroy of India 

 occupied a station in the neigbbourhood of Buxar, near Benares, with 

 a large party, which included Mr. Pope, of the Indian Survey, who 

 took photographs of the corona. Mr. Michie Smith, Government 

 Astronomer at Madras, and a party of observers occupied a station at 

 Sahdol. There were also three parties of observers at or near Jeur, 

 to the S.E. of Poena, viz. the American astronomers. Professor Camp- 

 bell and Mr. Burckhalter, taking large-scale photographs of the 

 corona; the Japanese astronomers, also taking photographs of the 

 corona ; and Professor Naegamvala, of the Poona College of Science, 

 with a large party of observers. 



Admirable arrangements were made by the Government of India, 

 special facilities were accorded by the Indian railway companies, 

 and valuable assistance was rendered by the Admiralty to Sir Norman 

 Lockyer, H.M.S. ' Melpomene ' being detailed for his party. 



I will now pass on to the consideration of the results obtained in 

 this eclipse. These may be classified as 

 I. Photographs of the Corona. 

 II. Spectroscopic Observations. 



III. Polariscopic Observations. 



IV. Photographs of Partial Phase for position of the Moon. 

 V. Miscellaneous. 



I. Photographs of the Corona, 



A special feature of this eclipse was the number and the variety 

 of instruments which were utilised to obtain large-scale photographs 

 of the corona, on a scale of about 4 inches to the sun's diameter. 

 Professor Campbell, Dr. Copeland and Mr. Michie Smith had each 

 a telescope 40 feet in length, the form of mounting this long tube 

 being different in each case. Mr. Michie Smith pointed his tube to 

 the pole, and reflected the sun's rays into it by a plane mirror turn- 

 ing about a polar axis — what is known as a polar siderostat. In this 

 form the image rotates slowly as the mirror turns with the diurnal 

 movement, and the plate (15 inches square) should therefore be 

 rotated slowly to get an absolutely fixed image. Mr. Michie Smith 

 had arranged for this, but did not receive the apparatus in time. 

 For short exposures of a few seconds, however, the rotation would 

 hardly be appreciable. 



Professor Campbell mounted his tube on a timber framework, 

 so as to point to the position of the sun at mid-totality, and applied 

 clockwork to move his plate, which was 17 inches by 14 inches. 

 Dr. Copeland used a fixed mirror to reflect the rays into his telescope, 

 which was mounted horizontally, and moved his plate (18 inches 

 square) by clockwork. 



The instrument I used was on a different principle, the large 

 scale being obtained by applying a concave lens (placed at the proper 

 point within the focus) to magnify the image formed by an object- 



