52 BULLETIN OF THK XATUKAL HISTORY SOCIETY. 



These results Avere not the product of a deliberately 

 planned investigation, or they would have been far more 

 minute and full, but were merely the gatherings of a 

 holiday excursion. 



As this paper is passing through the press I have had the 

 opportunity, through Professor Stoddard's courtesy, to lead an 

 important article by the inventors of the Thermophone — "The 

 Therniophone, a New Instrument for Determining Temper- 

 atures," by H. E. Warren and G. C. Whipple, in Technology 

 (/nai'teii !/ , for July, 1S95. In tliis the inventors fully and 

 clearly describe the instrument, and give in synopsis some of the 

 results obtained by its use. M}'^ results, as far as they go, agree 

 with theirs ; but the latter show remarkable seasonal changes, 

 and a disti'ibution through the year which is determined largely 

 by the different density of water at different temperatures, 

 especially when near the freezing point. 



