3C2 Tables 367-339. 



TRANSMISSIBILITY OF RADIATION BY JENA GLASSES. 

 TABLi: 367. 

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

 transmission through the thickness t. Deduced from observations by Miiller, 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. - Transmlssiblllty by Jena Ultra-violet Glasses. 



Smithsonian Tables. 



