Fernhw.ent Colours of Ofake Bodies. 253 



was much inferior to the two other colours, both 

 in quantity and brightnefs. The liquor, when 

 viev>?ed by incident light, appeared black. 



Sap green infufed in diftilled water, and viewed 

 in a fimilar bottle, tranfmicted the fame colours. 

 But, the green was not fo copious, or fo vivid, 

 as in the fpirituous tincture ; and the proportion , 

 of the yellow was likewife diminifhed. 



Thefe experiments afiFord a farther inftance of 

 the fuperior tranfmifTive power of inflammable 

 media ; fince the more refrangible rays are more 

 copioufly, and more vividly, tranfmitted by the 

 fpirituous tincflure, than by the aqueous infufion. 



By infufing grafs, and other green leaves, in 

 fpiritof wine, I obtained a tincfture, confifliing of 

 the fpirit of wine faturated with the colouring 

 matter of the leaves. This was examined in the 

 fame manner as the preceding liquors : it tranf- 

 mitted a bright green, where it was thinned ; and 

 a vivid red, where it was thickeft : but, the inter- 

 mediate yellow was fcarcely perceptible. This, 

 as well as the two former liquors, 'appeared black, 

 when viewed by incident light. 



I infufed litmus in diftilled water, and having 

 thus procured a coloured infufion, I filtered it, and 

 examined it, in the fame manner as the liquors, 

 which have been already defcribed. This infufion 

 tranfmitted an azure blue colour, where it was 

 thinneft -, and a bright red, v/here it was thickeft. 

 The intermediate colour was purple. This li- 

 quor 



