30 CO Miscellaneous Intelligence. 
' stubborn, intractable, unshod Tartar pony never missed a foot. Sharp 
rocks, deep stony torrents, slippery paths, or pitch darkness, were all the 
same to him. ‘These ponies are sorry looking beasts; but the Soubah, 
who weighs sixteen stone, rode his down the whole thirty miles of rocks, 
stones, streams, and mountains; and except to stop and shake them- 
selves like a dog, with a violence that nearly unhorsed me, neither his 
steed nor mine exhibited any symptoms of fatigue. Fever rages below 
from Choontam to Darjeeling. My people behave admirably, and I 
never hear a complaint; but I find it very hard to see a poor fellow 
come in, his load left behind, staggering with fever, which he has caught 
by sleeping in the valleys, eyes sunk, temples.throbbing, pulse at 120, 
and utterly disabled from calling up the merry smile with which the 
kind creatures always greet me. We have little rain, but much mist; 
and I find great difficulty in keeping my plants in order. Do not be 
alarmed for me about fever, for I shall not descend below 6,000 feet. 
I have not been below 10,000 feet for the last two months. 1 lead a 
hard, but healthy life; and know not what it is to spend a lonely-feeling 
hour, though without a soul to converse with. Arranging and labelling 
plants, and writing up my journal, are no trifling occupation, and lam 
incessantly at work, Josep Darton Hooker. 
. On the Classification of Colors. Part Il. By Professor J. D. 
Forses, (Proc. R: Soc. Edinb., ii i 
co 
scribing with precision the innumerable hues which occu 
and in art; and which it is equally desirable for the optical philosopher, 
the artist, and the manufacturer, to be able to refer to in a clear and 
nite manner. But such a nomenclature or classification must pro- 
ceed upon some admission as to the manner of compounding complex 
hues out of simple ones; and, therefore, the author first treats of the 
yellow light, we not only change the color, but we increase the illu- 
mination; whereas, by adding a blue to a yellow pigment, whilst we 
change the color, we at the same time reduce the luminousness of the 
surface, the blue particles being far less reflective than the yellow ones. 
Inferring from Newton’s empirical rule, the quantities of red, yellow, 
and blue light, which should combine to make white light 5 and adopt- 
ing Lambert’s results as to the reflective powers of the brightest p'g- 
ments, the author concludes, that the mean illumination of a disk put 
in rapid revolution, and containing colored sectors, will be 4°57 times 
less than if it reflected the whole incident light, or it will reflect only 
about half the light which white paper does under the same illumina- 
tion, therefore it will appear relatively grey under any given external 
illumination. 
The author then states, that the triangular arrangement of colors first 
proposed by Mayer, and farther carried out by Lambert, appears !0 
an a 
