COLOURS. 415 



bufFalo. In the East Indies it is a very common 

 and cheap colour ; the natives there use it com- 

 monly for colouring their calicoes, which they do 

 without any mordant, so that the colour is washed 

 out again when the cloth is dirt}'. 



King's 1/elloxv. This colour is orpiment refined, 

 which is a substance dug out of the earth, and 

 consists of sulphur joined to arsenic ; or it may be 

 prepared by subliming sulphur with arsenic. It is 

 of a very bright yellow, but does not stand very 

 well ; and great caution should be used in employ- 

 ing it, as it is a strong poison. 



Naples yelloxc. This is a very durable and bright 

 pale yellow ; it comes from Naples, and is supposed 

 to be prepared from lead and antimony. 



Yellow ochre. This is an earth coloured by 

 oxyd of iron. It is a cheap colour, and not very 

 bright ; but is valuable on account of its standing 

 well. 



Roman ochre. This is a superior kind of yellow 

 ochre. 



Dutch pink. This pigment is formed of chalk 

 coloured with the juice of French berries, or 

 other vegetables affording a yellow colour. It 

 does not stand, and is chiefly used for common 

 purposes. 



Gamboge is a gum brought from the East Indies. 

 It readily dissolves in water, and is a fine bright 

 yellow. It is used only in water, and is very 

 serviceable. 



Massicot is an oxyd of lead, prepared by calcin- 

 ing white-lead. It is very little used, the colour 

 not being very bright. 



Gall stones. This is a concretion or hard sub- 

 stance, formed in the gall-bladders of beasts j or it' 



