33 
beginning at light, viz. yellowish browns, red brown, and bluish or 
grayish brown, &c. 
The three extra lozenged quadrangles are continued from the yel- 
low and red forming orange, and the third tint blue is in the three 
degrees passed over them. 
The first or light blue forming chiefly orange browns; the second 
or middle forming greener browns ; and the third or full blue form- 
ing the darken or grayer and bluer browns. 
CHROMATIC SCALE. 
In order that the tints in the former plate 5 should not be blackened 
by figures, I have annexed the following one, plate 6 to explain the 
primaries, binaries, and ternaries, or form a list of tints in as simple 
an arrangement as possible, selecting the usual terms or commonest 
nomenclature, that it might be generally understood. I have ex- 
pressed the yellow by dots, the red by undulating lines, and the 
blue by straight lines. It may therefore be understood what colours 
pass into each other to form the binaries and ternaries, with a precision 
equal to that of a coloured example. These, in proper proportions, 
may serve to practise on, in some measure like the lines in heraldry, 
in the place of representing colours, upon many occasions, as in en- 
graving, &c. I now proceed to my nomenclature ; and, as much in- 
formation may be given by letters or figures, at present I shall 
use small Italics for light tints, small Roman characters for middle 
tints, and roman capitals for the full or perfect tints, as I have be- 
fore termed them : 
ij therefore may signify light yellow, 
y ■ middle do. 
Y full do., 
and the same of the red and blue. 
Binaries may therefore be explained by ?/. r., signifying light ycl- 
/oH' and middle red ; and ternaries thus, ?/. r. i?., signifying light yel- 
loiv, middle red, and full blue ; which will be easily understood by 
