on the terrestrial Rays that occasion Heat. 533 



Liquids. 



Transmission. 



Stoppage, 



Spirit of wine and two glasses 



- ,77^ 



224 



Gin 



- ,374 



626 



Brandy 



,00381 



996 



Scattering Transmissions. , 

 Crown glass, one side rubbed on emery ,14,6 - 854, 



Coach glass, ditto 



,115 



- 



885 



Crown glass, both sides rubbed on emery 



,0685 



- 



932 



Coach glass, ditto 



,0542 



- 



946 



The two first, together 



,03158 



- 



9 6 9 



The two next, together - > 



,0208 





979 



The four first, together 



,004,56 



- 



995 



Olive colour, burnt in glass - 



,0160 



- 



984 



Calcined talc - 



,00345 



- 



997 



White paper - 



,00556 



- 



994 



Linen - 



,0483 



- 



952 



White Persian 



,0841 



- 



91,6 



Black muslin - - 



,263 



- 



737 



Table of the proportional terrestrial Light scattered by various 



Substances. 



The same apparatus which has been used to gain the results 

 of the preceding table, has also been employed for the follow- 

 ing one, with no other difference than that while the vane with 

 the white paper remained on one side, the other vane was suc- 

 cessively covered by the objects whose power of scattering light 

 was to be ascertained, and both vanes were viewed directly 

 through the two open holes in the screen ; the eye being sta- 

 tioned in the same place as before. 



mdccc. 3 Z 



