THE HOVAYA-ZEMLYA OBSERVATIONS. 
201 
No. 
Exposure. 
i 
seconds. ! 
1 
5 i 
I 2 
15 
' 3 
40 
4 
2 
5 
15 
The four plates exposed during totality were developed by Mr. Shackleton before 
leaving Novaya Zemlya, and the fifth at South Kensington about five weeks later. 
Mr. Lockyer has been good enough to have these enlarged at the Solar Physics 
Observatory, by Corporal Haslam, R.E., and T have the pleasure of laying them 
before the Society (see Plate 1). It will be seen (by reference to ‘Phil. Trans.,’ 1889, 
vol. 180, pp. 291, &c.) that the expected agreement with the corona of 1886 is most 
marked. 
The field of view of the telescope employed was circular, with an approximate 
diameter of 100 minutes of arc. In the longer exposed photographs the longest 
streamer is cut off by the boundary of the field at 1 '06 of the moon’s diameter. 
As seen visually the streamer was estimated to have a length of 1-76 of the 
diameter. 
19. It should be noted that the other heavenly bodies seen and located by 
“ Otaria ” observers during totality were the planets Mercury, Jupiter, Venus, and 
Mars, and the star Regulus. The several independent sketches on plans, by eye, of 
the corona, coincided remarkably with the j)hotographs. 
I would add that during totality the darkness was not sufficient to interfere with 
the reading of the chronometer in the open, or of a Benson’s chronograph inside the 
telescope hut. The atmosphere may possibly have been lighted up by the large 
areas of snow-covered land in our neighbourhood. 
20. The Meteorological observations made at the time were significant. 
(1.) The self-registering (Negretti and Zambra) thermometer, placed in 
sunlight, indicated remarkable changes of temperature, ranging, during the 
period of the eclipse, from 47° Fahrenheit down to 36°, and rising, within 
three hours after totality, to the maximum for the day of no less than 62°. 
(2.) The self-registering barometer (Negretti and Zambra), as will be 
seen by the accompanying photographic enlargement (not reproduced here), 
gave no indications except those of unevenness. 
But readings, at necessarily irregular intervals, of the sympiesometer 
(Negretti and Zambra), before and after totality, gave the following 
results :— 
2 P 
YOL. cxc,—A. 
