738 PROCEEDINGS OF THE AMERICAN ACADEMY. 



and in India as a substitute for slate and thatch for roofing. 

 It is incombustible, water-proof, neither shrinks nor contracts 

 under heat or cold, weather-proof, and cheap. It may be 

 worked with ordinary carpenters' tools, planed, polished, 

 veneered, painted, frescoed, or otherwise treated. 



The following papers were presented by title by Professor 

 John Trowbridge : — 



"Resonance in Wireless Telegraphy," by G. W. Pierce, 



" A Manometric Device for the Air Thermometer," by Harold 

 Edwards. 



" Note on the Platinum Thermometer," by Harold Ed*vards. 



" Spectra of Gases at High Temperatures," by John Trow- 

 bridge. 



Nine hundred and fifty-first Meeting. 



October 12, 1904. — Stated Meeting. 



The President in the chair. 



The following letters were read : — 



From Herbert Weir Smyth, accepting Resident Fellowship ; 

 from Eugene W. Hilgard, James D. Hague, T. Mitchell Prud- 

 den, acknowledging election as Associate Fellows ; from Adolf 

 Harnach, Gaston Boissier, Pasquale Villari, Felix Klein, acce})t- 

 ing Foreign Honorary Membership; from the Prussian jNIinister, 

 Mr. Studt, presenting a medal commemorating the bi-centennial 

 jubilee of the Royal Prussian Academy of Sciences ; from the 

 National Society of Natural Sciences and Mathematics of Cher- 

 bourg, announcing the death of its director and founder, j\I. 

 Auguste-Franc;'ois Le Jolis ; from the Belgian Society of Astron- 

 omy, soliciting membership ; from the National Library of Turin, 

 soliciting aid in replacing its library lost by fire ; from a com- 

 mittee soliciting contributions for erecting a monument to 

 Theodor Mommsen. 



The Chair announced the following deaths: — 



James M. Barnard, Resident Fellow in Class I., Section 3 ; 

 George F. Hoar, Resident Fellow in Class HI., Section I. 



On motion of the Recording Secretary, it was 



