254 Dr. Garnett’s Arrangement 
obferved, that the monfoons on the coafts of Africa 
and India, appear to be occafioned by the conftant 
decompofitions, or falls, continuing for feveral 
months together in the inland and mountainous 
parts of thefe continents; the air rufhes in currents 
in all directions to the precipitating fpot, in order 
to fupply the lofs of the volume, or real quantity of 
the air, from the decompofition conftantly going on. 
It may indeed be faid, that the air, by lofing the 
vapour, lofes only part of its weight, but none of its 
volume, and, by becoming more light and elaftic, 
it mounts up to the fuperior regions, and runs 
‘pack, in a contrary current, to fill up’the deficien- 
cies from whence the underloaded portions of the 
atmofphere came. 
In the firft place, this can never be demonftrated, 
and Qdly. probability is rather again{t it; for, in 
this country, the upper ftrata of clouds feldom go in 
a contrary direction to the wind below, but only 
for a few hours, till the inferior portion comes, by 
the friction and preffure of what is above it, to 
partake of this new impetus; difcontinuing the 
direction in which the whole formerly proceeded, 
it foons follows the fuperior ftrata which always lead 
theway. Thirdly, in all great precipitations, it uni- 
formly appears, that the current or impetus of the 
air is conftantly accompanying the fall of the drops 
to the furf.ce of the earth, and not upwards; fo that 
a change of its pofition at the time it parts with its 
watery vapour, fo as to become fuperior, and prefs 
upon 
