THE NOYAYA-ZEMLYA OBSERVATIONS. 
199 
10. We erected shelter tents of spars and sails and set up the Willesden ca.nvas 
huts for the 12" Cooke siderostat, two large spectrum and one corona photograph 
telescopes. 
11. Mr. Stone, with the aid of Lieutenant Webb, used a small but powerful 
equatorial (presented to the Radclilfe Trustees by Frances Anne, Dowager Duchess 
of Marlborough). 
The spectroscope was one made, from Mr. Stone’s plans, specially for the eclipse 
by Mr. Hilger. The dispersion in the photographic camera consisted of a direct 
spectroscope, capable of separating the D lines, and a prism of crown glnss of 60°. 
The light reflected from the surface of the prism was used for a second direct spectro¬ 
scope, and the instrument, therefore, admitted of combined eye and photographic 
spectrum observations. 
12. Mr. Shackleton worked with a prismatic camera of 3 inches aperture with 
two prisms of 60°, using the siderostat, and also a direct vision slitless spectroscope, 
by means of which he was enabled to signal with exactness the disappearance of the 
continuous spectrum. 
13. I took charge of the coronagraph provided by Mr. Lockyer. The telescope 
was one of 4|- inches aperture and 6 feet 9 Inches focal length. The object glass was 
not new, and decidedly green in tint, but it was the only one available for the expedi¬ 
tion. The size of the image was 076 inch, and the ratio of aperture to focal length 
was -j-f 5 -, 
The telescope was mounted in a N. and S. direction immediately above the pris¬ 
matic camera, so that both could use the one siderostat. Mr. Shackleton, with 
commendable care and trouble, finally secured admirable adjustments of all these 
instruments. 
14. Meteorological observations were made by means of a self-registering barometer 
and thermometer and a sympiesometer. 
Lady Baden-Powell and the yacht’s crew were detailed to make drawings of what 
they could see of the outer corona, on printed diagram plans designed by Mr. Stone, 
and to note the position of any “ stars ” seen, and otherwise observe general aspects. 
15. Ever}/thing was ready well in time, and throughout the eclipse all proceeded 
most satisfactorily. In all, twenty-nine good photographs were secured. 
16. The local times of commencement and end of totality were noted by the sailing- 
master of the “Otaria”—Captain C. WiLLCOX —as being 7^' 34™ 54" and 7^ 36™ 44" 
respectively, but there was some doubt as to the signal for the end of totality. 
Captain Willcox also gave out the number of passing seconds, by chronometer, for 
the information of the observers. 
17. With regard to the spectroscopic results obtained, both by Mr. Stone and 
Mr. Shackleton, I am informed that they promise to be of the highest scientific 
value ; they are now being worked out by Mr. Stone and Mr. Norman Lockyer 
respectively, but the final elucidation will naturally occupy some considerable time. 
