3O2 TABLES 367-369. 



TRANSMISSIBILITY OF RADIATION BY JENA GLASSES. 



TABLE 367. 



Coefficients, a, in the formula It = ha*, where h is the Intensity before, and It after, 

 transmission through the thickness t. Deduced from observations by Muller, Vogel, 

 and Rubens as quoted in Hovestadt's Jena Glass (English translation). 



TABLE 368. 



Note : With the following data, / must be expressed in millimeters ; i. e. the figures as given 

 give the transmissions for thickness of I mm. 



This and the following table are taken from Jenaer Glas fiir die Optik, Liste 751, 1909 

 TABLE 369. - Transmlsslblllty by Jena Ultra-violet Glasses. 



SMITHSONIAN TABLES. 



