Smithsonian Report. 1953.— Richardson 



Plate i 



1 . Photoelectric apparatus for Analysis of transient Sounds. 



"fhW 



^Y^A\ 



(a) 



(c) 



Ni-^l" 



A/V/vv: 



(6) 



(</) 



2. Wave Forms of Flue Organ pipes (C520). 



a, 60 percent lead, 40 percent tin; b, IS percent tin; c, 50 percent tin; d, all tin. (The pipes 

 used for the records were made and lent by Harrison's Organ Works, Durham, England.) 



