PROCEEDINGS 



C^F THE 



Delaware County Institute of Science 



Volume VII Numbp:r 3 



SOLAR HALO OF MAY 20, 1915. 



BY MERWYN R. LEWIS. 



Very often, immediately after some important event has 

 taken place, or an unusual demonstration of the limitless 

 forces of nature has occurred, the whys and wherefores, the 

 causes and effects, and the signs and omens, are generally 

 and freely debated by men and women who are in any degree 

 interested in scientific matters. For a time, then, the subject 

 is fresh, the details clear, and the causes satisfactorily settled 

 in the mind. But Time is an impatient fellow and passes 

 swiftly by, and with his passing he obscures the wonderful 

 details — distorts, if he can, the important causes, and too 

 often unsettles and disconnects the whole fabric of things. 

 Men care to keep pace with the tireless rover and do not turn 

 aside to foil him by making a record of events and things that 

 he will otherwise destroy. 



The commission of making such a record of the Solar 

 Halo of May 20th, 1915, was delegated by the Institute to 

 the writer, who has endeavored to carry out the wishes of the 

 society by preparing a record in as comprehensive and as con- 

 cise a manner as possible. The duty has proven to be a most 

 pleasant one, and it is with an earnest expression of hope 

 that this short paper will be as interesting, in a measure at 

 least, to those who may care to read it, as it was to prepare. 



On the following pages it is not the intention of the writer 



