328 
On Shading Mountain Land, 
[April 
Hygrometrical State of the air. 
Leslie’s Hygrometer, greatest ditto, on the 24th, at sun set, 45 
Ditto ditto, least ditto, on the 29th, at 10 a, m. — 3 
Kater’s ditto, greatest ditto, on the 28th, at 10 p. m. 615 
Ditto ditto, least ditto, on the 26th, at 2 p. m. 242 
Statement of the Winds, shewing their direction and force 
North-east, on the 7th, 
East-north-east, on the 1st, 
Ditto, on the 2nd, 6th, 10th, 11th, 12th, 1 8th, 20th, 
22d, 23rd, 24th, 25tli, and 26th, 
Ditto, on the 4th, 5th, 8th, 21st, 27tli and 28th, 
Ditto, on the 9th, 13th, 14th, 15th, 16th, 17th, & 19tb, 
West, on the 3d, 
Ditto, on the 29th, 
North-west, on the 30th and 31st, 
during January , 1829- 
gentle 
1 day 
moderate 
1 ditto 
light 
12 days 
gentle 
6 ditto 
little 
7 ditto 
moderate 
1 ditto 
little 
1 ditto 
ditto 
2 ditto 
Sir, 
V . — On Shading' Mountain Land, 
To the Editor of Gleanings in Science. 
I have read with deep interest the 3d article in your 14th number on the Me- 
thod of Shading Mountain Land ; though 1 will acknowledge I felt surprised that 
your intelligent correspondent should have taken the trouble to write on .an art so 
little esteemed or practised in India. 
We must cease, however, to wonder at this apathy, when we consider that most 
of our surveys are confined to the plains, and that even those, among the moun- 
tains are often simple lines of route, few occasions having yet arisen for examining 
details out of the more frequented lines of communication. 
In offering my remarks on this subject, I trust I shall not be thought disposed 
to cavil, if I am found to disagree on some points with your very able correspondent; 
object being, like his, to elicit improvements in a neglected but useful art, 
\ the tree hut fair discussion of every thing connected with it. 
will premise, that I have not had opportunities of studying recent improvements 
made in Europe in this branch of drawing, thirteen years Lvfng elXd srnce r 
concluded my course of instruction at home, since when, I have beLlXomvown 
resources for the little real practice that is called for in India. 7 
ie German method was made known to me some years ago, and promised such 
olmous advantages, that I hastened to avail myself of them, and for a time thought 
the art was rendered thereby perfect. But I have since found that ;*■ ii lU0 e 
der other defects besides those pointed out by D labour9 
The difficulty of distinguishing; the top of the hill from the valley is not shears 
hollow or a projoc tiim , ! >y ]? tIle same is to l,e considered a 
centre, because there may be a lake or pod! entafon of water in tbe 
the bottom of a valley or hollow. Such instanced occur' * "’ 0 “ nta , ,n , as .' re11 » s “ 
be seen in Merionethshire! ^ pfU tIcnlcirIy ln volcanlc 
monly incapable of represen ting th^acch^f^ 0 n °* , ? ed; the German method is com* 
which great mountoiffeXL are nfr. “ ° f “'f"*™"' ridges or necks, by 
necks is usually so small, that even whcnThfrge'' scateTs”' 6 br ? ad ‘ h °( such , 
room for the introduction of even a tew 
fre^ently^a^id^ouW^Msily^ fns^aim^o ° f !' ar f °, ccurrence - 1 have met them 
presentation of the feature ?„ S* “T’?'* or erroneous re - 
convenience, as the neck afford attended with serious in- 
mountain 4000 feet high ; no equally easv * g,b 6 - ot r ? ad in the ascent of a 
b i , no equally easy communication existing for many miles 
