TABLES 21 3-21 5 . 

 TRANSMISSIBILITY FOR RADIATION OF JENA GLASSES. 



TABLE 213. 



Coefficients, a, in the formula I t 7<xz*, where 7 is the Intensity before, and / after, transmission 

 through the thickness /, expressed in centimeters. Deduced from observations by Miiller, 

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



TABLE 214. 



Note : With the following data, t 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 fur die Optik, Liste 751, 1909 

 TABLE 215. - TransmisslMllty of Jena Ultra-violet Glasses. 



SMITHSONIAN TABLES. 



