PROCEEDINGS OF THE ACADEMY AND AFFILIATED 



SOCIETIES 



THE PHILOSOPHICAL SOCIETY OF WASHINGTON 



The 8o8th meeting was held at the Assembly Hall of the Carnegie 

 Institution, November 9, 19 18, Vice-President Humphreys in the 

 chair; 65 persons present. The minutes of the 807th meeting were 

 read in abstract and approved. 



J. C. Hammond presented the first paper on Observations of the solar 

 eclipse of June 8, IQ18, by the Naval Observatory Eclipse Expedition. 

 The paper was illustrated by lantern slides. 



The party was located at Baker, Oregon. The program comprised 

 (i) observing the times of the contacts, (2) photographing the corona, 

 and (3) photographing the flash spectrum. The equipment consisted 

 of a 5-inch equatorial, a 3-inch Fauth transit with a latitude level 

 attached, three cameras of focal lengths 65 feet, 105 inches, and 33 

 inches, respectively, and three spectrographs, each employing a concave 

 grating and used without slit. 



A thin cloud or haze over the sun during totality affected the results. 

 The times of the contacts were determined, good photographs of the 

 inner corona and prominences were taken with the 65 -foot photo- 

 heliograph, and some results of value will be obtained from a discussion 

 of the spectrographs. 



Discussion: This paper was discussed by Mr. C. G. Abbot. 



Herbert H. Kimball and S. P. Ferguson presented the second 

 paper on Meteorological phenomena of the solar eclipse of June 8, igiS. 

 This was illustrated by lantern slides. 



The paper was a summary of meteorological observations obtained 

 at about 55 Weather Bureau stations within the zone of 90 per cent 

 obscuration of the sun, and of measurements of both incoming and 

 outgoing radiation obtained at Goldendale, Washington, by means 

 of a Smithsonian pyranometer and an Angstrom pyrgeometer. 



At Goldendale the sky was partly overcast on the day of the eclipse, 

 but clear about the sun during the totality. Between first contact and 

 about 10 minutes after totality, approximately one-third the usual 

 amount of radiation was received, and the temperature fell 3.6° C. 

 During totality the outgoing radiation averaged about 0.162 calorie 

 per min. per cm.-, which is less than observations on clear nights would 

 lead us to expect, probably because of radiation received from the 

 cloud layer. 



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