OF THE SUN OBSERVED AT CAROLINE ISLAND, 1883. 
135 
The six photographs taken with the small photoheliograph are very good, the one 
with 2 minutes’ exposure extending as far as those of Janssen, which were exposed 
during the whole totality. All taken with the large instrument show slight shifts, 
probably due to the changing of the slides in the smaller instrument; still they will 
be useful in making out the detail near the limb, and we believe that from the nine 
plates a drawing can be made that will show the whole structure from the limb to 
the furthest extension of the corona. 
With tlie second order flat grating apparently we do not seem to have caught 
anything, but before stating that we have been unsuccessful we must examine the 
plate under better conditions of illumination; in the first order grating H and K are 
present as bright lines at the commencement and end of totality ; the dense prism 
spectroscope also shows bright lines at the beginning and end, especially at the end, 
H, K, h,f, F being very marked. 
Two gelatine red end plates in the prismatic camera were successful as photographs, 
but, owing to the comparative absence of prominences, will not be so fruitful in their 
results as the photograph obtained with this instrument in 1882. The slit spectro¬ 
scope gave a good photograph from the ultra-violet to the green. The spectrum 
appears mainly continuous, but differs on the two sides of the disc. H and K are 
very marked, but do not extend across the interval, as they did in last year’s. The 
hydrogen line near G extends out nearly a solar diameter; h, F, and 1474 also 
appear. There are other lines, but they are not so numerous as in the 1882 eclipse. 
The Eowland grating seems to have given no useful results, but this is due to the 
same cause as the indifferent results in the prismatic camera. The integrating spec¬ 
troscope was successful. There was little or no perceptible change in the character 
of the spectrum .till just before totality, when the brightest lines of the reversion 
spectrum were caught. H and K, 1474, and the hydrogen lines are most prominent. 
The flash was also caught at the end of totality. During totality no result appears 
to have been obtained. 
We commenced packing up on the 7th ; and on the 9th, at 5 P.M., we left Caroline 
Island for Honolulu. 
