OF RADIANT HEAT THROUGH DIFFERENT BODIES. 



65 



Transmissions out of 100 rays. 



Names of the substances 

 interposed. 



(Those plates whose thickness is 



not specially indicated have the 



common thickness of 2'"'"'6.) 



Rock salt 



Filiate of lime 



Beryl 



Iceland spar 



Glass (thick. O^'^'S) 



Glass (thick. 8'"'") 



Rock crystal 



Chroniate of potash 



Sulphate of barytes 



White agate 



Adularia felspar 



Yellov amber 



Black opake mica(thick.0'"'"'9) 



Yellow agate 



Emerald 



Borate of soda 



Green tourmaline 



Common gum 



Sulphate of lime 



Sulphate of lime (thick. 12""") 



Carbonate of ammonia 



Citric acid 



Tartrate of potash and soda . . . 

 Alum 



Coloured glasses, 

 (common thickness 1""°*85.) 



Glass, white 



— violet 



— red 



— orange 



— green (apple) 



— green (mineral) 



— yellow 



— blue 



— black (opake) 



— indigo 



92 

 78 

 54 

 39 

 54 

 34. 

 38 

 34 

 24 

 23 

 23 

 21 

 20 

 19 

 19 

 18 

 18 

 18 

 14 

 10 

 12 

 11 

 11 

 9 



40 

 34 

 33 

 29 

 25 

 23 

 22 

 21 

 16 

 12 



a - 



92 

 90 

 80 

 91 

 90 

 90 

 91 

 57 

 36 

 70 

 23 

 65 



0-4 

 57 

 60 

 23 



1 

 61 

 59 

 56 

 44 

 88 

 85 

 90 



90 



76 

 74 

 65 



3 



1 

 49 

 47 



0-5 

 27 



o 2- 



92 

 91 

 91 

 89 

 85 

 82 

 85 

 53 

 47 

 78 

 58 

 61 

 12 

 64 

 57 

 33 

 10 

 52 

 54 

 45 

 34 

 52 

 60 

 47 



83 

 72 

 69 

 58 

 20 

 15 

 46 

 42 

 18 

 26 





92 

 88 

 66 

 56 

 68 

 47 

 52 

 71 

 25 

 30 

 43 

 20 

 16 

 24 

 26 

 23 

 14 

 12 

 22 

 17 

 11 

 16 

 15 

 15 



50 

 42 

 41 

 36 

 22 

 19 

 27 

 26 

 11 

 14 



92 

 90 

 70 

 59 

 87 

 56 

 78 

 28 

 60 

 43 

 50 

 13 

 38 

 35 

 20 

 30 

 24 



6 



9 



5 



6 



3 



2 



0-5 



67 

 56 

 54 

 48 

 55 

 52 

 35 

 34 

 42 

 20 



ill 



92 

 91 

 57 

 55 

 80 

 45 

 54 

 24 

 57 

 17 

 23 



8 

 43 

 14 

 21 

 24 

 30 



4 

 15 



0-4 



5 



2 



1 



0-3 



55 

 47 

 45 

 39 

 50 

 58 

 30 

 29 

 52 

 17 



Vol.. I. — Part I. 



