TABLES 186-188. 

 TRANSMISSIBILITY FOR RADIATION OF JENA GLASSES. 



TABLE 186. 



Coefficients, a, in the formula It = foa*, where /o is the Intensity before, and ft after, transmission 

 through the thickness /, expressed in centimetres. Deduced from observations by Mtiller, 

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



TABLE 187. 



Note : With the following data, / must be expressed in millimetres ; 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 188. - Transmf ssibility of Jena Ultra-violet Glasses. 



SMITHSONIAN TABLES. 



