ON THE TOTAL SOLAR ECLIPSE OF MAY 17, 1882. 271 
have been able to measure about thirty additional lines, thus increasing the number 
considerably. 
The fact that part of the outer corona shines by reflected light has been once more 
proved by the presence of the dark Fraunhofer lines near G ; and if any doubt 
previously existed respecting the presence of dark lines in the corona spectrum, 
that doubt is now completely removed. 
The results have amply proved the value of the photographic method employed, 
and it has been shown how an eclipse of only 70 seconds’ duration can be made to 
yield important information. 
We cannot conclude this paper without a reference to the energy and zeal displayed 
by Mr. C. It. Woods, the assistant told off for the photographic operations. His careful 
development of all the plates has largely contributed to the success of this branch of 
the expedition. A six months’ practice in South Kensington with the particular 
plates employed for the observations made him thoroughly master of the manipulations 
required, and to his mechanical skill in the preparation of some of the pieces of appa¬ 
ratus we are indebted. Mr. Lawrance, Mr. Lockyer’s assistant, also gave valuable 
aid in the photographic work at the observing station. 
