THE BOOK OF THE LANTER'X, 149 1 



that any one ignorant of the subject were to attempt 

 to use such a colour as vermilion, which is opaque ; it 

 would appear to be of the usual vivid scarlet when seen on 

 the glass, but seen through the glass, it would simply be a 

 black patch, because the light cannot filter through ik 

 This being the case with all the opaque colours, we there- 

 fore discard them. I now annex a list of colours which are 

 at the disposal of the slide-painter, and which are all more or 

 less transparent. They are not all actually essential, but 

 still the artist will do well to procure them, as they will 

 give him an immense variety of tints : 



Prussian Blue Brown Madder 



Indigo i Rose Madder 

 Italian Pink Purple Madder Af 



V" Raw Sienna v/ Crimson Lake 



V^ Yellow Lake Ivory Black 



Chinese Orange \ Burnt Sienna 



,/ Neutral Tint McGilp. 



\f Brown Pink 



It will be noticed that there is only one brilliant blue in 

 this list, that is Prussian blue. For landscape work this 

 blue is used, perhaps, more than any other colour ; for skies 

 always, and it enters into the composition of the various 

 greens, and forms useful tints with most of the other pig- 

 ments. It is not the colour which an artist would choose by 

 preference with which to depict the tender tints of the sky, 

 for, truth to tell, it has a greenish hue, and is rather cold 

 and repellent in character ; but it is really the only blue 

 which can be laid on the glass in a flat, even tint, and 



