88 CARNEGIE INSTITUTION 



Thursday , June 25. — Between 6.30 and 7.15 a. m. the seeing was 

 excellent in every way, the image very clearly defined and almost 

 wholly free from blurring — steel plate effect. 



Between 9.30 a. m. and 12 m. the image was less satisfactory than 

 early in the morning. The limb of the sun was not so stead)'', and 

 blurring was more frequent and more pronounced. 



In the afternoon, between 4 and 5.45, the seeing was good, but 

 by no means equal to that which we had early in the morning. 

 Professors Campbell and Hale arrived at Wilson peak this after- 

 noon. Professor Hale rated the afternoon seeing at 4. 



Friday, June 26. — Early in the morning, from 6.15 to 7.15, the 

 seeing was very good, but not equal to that of yesterday morning, 

 nor to that of last Sunday afternoon. Between 9 and noon it was 

 less satisfactory. It was then fair and was given a rating of 3. 



During the middle portion of the day it was very warm. No ob- 

 servations were made in the afternoon until about 4 o'clock. The 

 seeing was then excellent. Professor Hale rated it at 4. It con- 

 tinued good until nearly 6 o'clock. 



In the early part of the night the seeing was good, but not excel- 

 lent. The central discs of the star images were small and distinct, 

 but the diffraction patterns were more or less in motion. 



Saturday, June 27. — Early in the morning, between 6 and 7.15, the 

 seeing was excellent. Later, during the afternoon, it was fair. In 

 the latter part of the afternoon it was found to be excellent again. 



Sunday, June 28. — Greater part of the day spent in exploring the 

 mountain in company with Professors Hale and Campbell, and 

 Messrs. Staats, Holmes, and L,ukens, of Pasadena. 



About 8 o'clock the seeing was found to be very good, and it was 

 also good in the middle of the afternoon. 



Monday, June 29. — Partially cloudy most of the day. No obser- 

 vations made during the forenoon. At 3.30 p. m. the seeing was 

 not good. 



Tuesday, June jo. — Seeing good in the morning and also in the 

 afternoon. Most of the day spent in photographic work. Seeing 

 good in the evening. 



Wednesday , July 1. — No observations were made during the fore- 

 noon. The seeing was excellent between 4 and 5 o'clock in the 

 afternoon. In the evening a wind arose and the seeing went to 

 pieces. 



Thursday, July 2. — At 9 a. m. the seeing was good. There was 

 some blurring and a little disturbance at the sun's edge, but these 



