1 66 Mr. Delava! on the Cauje of the 



vegetable, mineral, and animal colouring parti- 

 .cles, on the rays of light. 



The expreffions, refle^ed light, and tranjmitted 

 light, have been generally ufed, when Tranfparent 

 Coloured Bodies have been confidered. But, as 

 the following experiments and obfervacions, (hew 

 that Tranfparent Coloured Bodies are not endued 

 with any reflective power, the word refleCfed, can- 

 not properly be applied to the light which falls 

 on them. I have, therefore, at the head of the 

 laft column of this table, fubftituted the words 

 *' incident light" inftead of the ufual exprefTion, 

 reflected light. 



Table o/" Transparent CoLOunED Liquors viewed 

 by TRANSMITTED, and hy incident Liqht. 



L I Q^U O R S. 



1. Iron diflblved in the Nitrous Acid 

 i. Martial Alcaiine Tinfture of Stahl 

 5. Vitriol of Iron diflblved in Water 



4. Dilute Solution of Green Vitriol, with 



Infufion of Galls ... 



5. Dilute Solution of Green Vitriol in 



Spirit of Wine, with Tindlure of 

 Galls in Spirit of Wine 



6. Saturated Solution of Fixed Alcali, in 



which a fmall Quantity of Green Vi- 

 triol is diilblved, with Infufion of 

 ■Galls - - . . . 



By By 



Tranfmitted Incident 

 L'ght. Light, 



Yellow Black 



Orange Black 

 Black 



Green 

 Blue 



Black 



Blue Black 



Red 



Black 



7. Dilut? 



