98 



MEMOIES OF THE NATIONAL ACADEMY OF SCIENCES. 



Lifit of 23 new double .stars discovered at Caroline Island betivcen Ajyril 27 and May 7, 1883, hij 



E. S. HoLDEN and C. S. Hastings. 



List of 5 neiD colored stars discovered at Caroline Island by E. S. Holden. 



It will be observed that my estimates of magnitude are in general about one magnitude smaller 

 than Stoue's. The latter are to be preferred, as I was not familiar with the appearance of stars 

 in the G-iuch telescope. 



VI.— PLANS FOR WORK ON THE DAY OF THE ECLIPSE, ETC. 



(By Prof. E. S. Holden.) 



General instructions as to the plan of work were given to me by the committee of the National 

 Academy of Sciences, but the details of carrying out their intentions were left to me. 



It is my opinion that the very short time of the totality of a solar eclipse should be utilized by 

 any one observer iu making a single observation, or at least a single kind of observation. The 

 time, even of the longest totality, is all too short, and if it is further diminished by the times 

 required to move from one instrument to another, or to change apparatus, the real value of the 

 observations which are made is seriously lessened. It was, therefore, my effort to assign to each 

 observer one single piece of work, which he could reasonably hope to accomplish, so that his re- 

 sults would have a perfectly defiuite meaning. 



