great to render the production 
theory an utter impossibility. J n n /“VJ^^“| icat ed by that theory, 
granite taken place in the alow Mid gradiw manner ww* d / w(rald have 
ft is certain that the fib par q««* nn-j® ij“ ““** Layers , having 
arranged themselves into at leas uppermost of these layers would 
not the least resemblance to „r. . \L. es t WO uld have consisted of 
have been felspar, the next iWbt^elTin strict accord with 
mica and hornolende. Such avie ^ ‘ erti j become only the exponent 
the laws of nature, and, m makm f gravitation. By an average 
of that force which is known ^ the to be 2*654 ; 
of all my experiments I found the g i J * tz 2 *63, and that of 
that of felspar derived from gram > 1 jf therefore, we suppose a 
mica and hornblende to vary from 2 , , ^ d ’fused together into one 
mixture of felspar, quartz, Z influence of 
fluid, and then left to cool ^naUy and form 
gravitation, it is undeniable that ? t have pointed out, just as mud 
distinct layers exactly in the ™^^Vo^wato“nd cream rises to the 
under the same influence fads incredible time assumed in the nebular 
surface of milk. Viewing, th e > j ie o-lobe, it ought to follow 
theory for the cooling and solidification sep ar!tion of the 
• the face of these different specific g/amt,es that tt , 1 ^ and 
I/O J-XX 
crystallized and hastily coolecl mass. It t^^oint By that theory it is 
the nebular theory do not, however, stop remained^for many ages in 
asserted that after the vapour pe ‘ influence of gravitation, 
the form of a fluid spherc,subjeet meanwhile to &ye settled 
so that all the heaviest and most fi . however we find, even in the 
down towards the centre of tie ; g 0 f* d ^ platinum, we have a right 
outer crust, highly ponderous bodies 8 . ^ ^ eart i 1 im der that crust 
to infer from the above theory that * P SDec ific gravity. But we know 
is composed of matters having an twenty-one times heavier than an 
by experiment that platinum is we are corn- 
equal bulk of water, and, following \ f ^e w hole globe is at least 
pelled to conclude that the specifi g ^ J proved by the most 
equal to that of platinum. NwrtihdjM ^ ^ ^ 
careful calculations that the whote wth, ' viewed as api , that it is 
or even so 
rxris 
ing to the slow nebular notion, nurposea cavity was chiselled out 
would have upon fused granite. For „ , rr ., n j t e from the Himalaya 
in a lump of Aberdeen granite , and. . “ e c ^ aD ™ e * r °f ec6 iu question 
mountains in India w jW fTnowerfrd oxy-hydrogen blow- 
weighed 740 gams, and, by the action h ^ g the consis- 
pipe, it was fused in less than , than two minutes 
telce of thin syrup, and ^ing then aUowed “J™ d etached and 
it became solid. When quite cold fused i d t 
examined. Its resemblance to * e wit h a sample of dark- 
striking, so much so indeed, that whe ^ difficulty identified. 
coloured obsidian from Iceland, it waso J d ag I had entirely repn- 
dkSlr^ ad of n th e P^uctioTSg^i^ 
£S3\S A- »** - * ■" 
time, had been employed in the granitic formation. 
bC fcD 
