14 
PROFESSOR J. NORMAN LOCKYER ON THE 
driving screw, 4 inches in length, which was turned by hand, and in this way the 
sun’s image could be kept sufficiently near to the centre of the screen to ensure a 
large proportion of the direct rays of the corona entering the collimator. 
The instrument was housed in a tent made of spars and sails, loaded with rocks to 
prevent it being blowm away by the wind. The only opening was towards the east, 
in the direction of the eclipse, but on the morning of the eclipse one side was removed 
in order that the workers might be able to view the phenomena as opportunity 
offered. 
Three plates were exposed during totality with the following exposures, but no 
results were obtained :—■ 
1 
Number. 
Exposure. 
Time. 
Remarks. 
1 
15 seconds 
105-90 
2 
65 
85-20 
o 
10 „ 
15^ 5 
5 seconds allowed to prevent ovcx’-running 
The times indicated in the table are, as before, those announced by the general 
timekeepers as measuring the number of the remaining seconds of totality. 
Lieutenant MaPiTIX, Pi.N., was assisted by Midshipman Silveetop as exposer. 
Midshipman Beexdon as special timekeeper, wdille Midshipman Woodbeidge 
attended to the screw for keeping the collimator directed to the sun. 
The Refractor, 
The 3| inch Cooke telescope was mounted on a small equatorial head without 
clamps or adjustments. In this case the tripod stand was dispensed with, and the 
head was screwed to the top of a loaded packing-case. A diagonal ejmpiece, which 
could be rapidl}^ changed, by a simple operation, from total deflection at a silvered 
surface to reflection from plane glass, was provided. 
With this instrument it was my intention to observe the times of commencement 
and ending of totality, and the structure of the inner corona. Observations of the 
corona wmre also to be made by Lieutenant Hodges during the time I was eno-ao-ed 
with other instruments, H. Lewis, 3rd Writer, wms to act as recorder. It was calcu¬ 
lated by Dr. Lockyee, that 7 minutes 50 seconds before totality the visible crescent 
■would extend over 180°, and I hoped to utilise this fact as a check on the accuracy 
of the chronometers. 
Sketches of Corona. 
As no photographic telescope was available for the work at Kio Island, I had to 
rel}^ upon sketches to indicate the general appearance of the corona. Experience 
has shown that although drawdngs usually represent the feebler extensions more 
