t 146 ] 



quantities of each ; fo that red, blue and yellow, 

 by a compound of fome two of them, produce 

 the fine colours, viz. purple, green, and orange- 

 colour ; and the three primary colours, red, blue 

 and yellow, compounded all together, in differ- 

 ent proportions, produce all the different degrees 

 of browns and cloth-colours, and a fhadow for 

 white itfelf : for if you take a round piece of 

 card-paper^ and divide it into three parts, by 

 lines from the center to the circumference, and 

 wafh thefe three parts with the three primary 

 colours, fo that neither of them be too ftrong 

 for the other, and all them pretty light, then 

 fix a pin in the centre, and turn it about fwift- 

 ly, you will find the colours will be loft in each 

 other, and the paper will appear white, though 

 not of fo pure a white as before it was colour- 

 ed. 



Though all colours may be compounded 

 from three of the principal colours, yet as the 

 colour-fnops produce a long lift of colours, 

 wherein are variety of reds, blues and yellows, 

 of different fliades and cafts, as well as browns 

 of mapy different forts, it will be convenient for 



thofc 



