MR. ROBERT MALLET ON VOLCANIC ENERGY. 
OOO 
JjAo 
one half the volume of hot water really brought annually to the surface, or that the 
mean temperature of the hot water is below the truth, and if we double the result so 
as to include these, we find that the totality of the thermal waters of our globe does 
not probably exceed half a cubic mile of boiling water per annum, the equivalent of 
which in melted ice at 32° shows that the entire amount of hypogeal heat thus carried 
off is not the one thousandth part of the total annual heat lost by our globe, as taken 
at 777 cubic miles of ice melted to water at 32°. 
Whether, therefore, thermal springs be viewed as mere adjuvants to the dissipation 
at the surface of hypogeal heat, or as products of volcanic heat directly and in all 
instances, their influence is insignificant, and does not affect the views contained in 
the text. 
B. Heat and work f rom Quartz-crushing. 
Derived from the work done in crushing quartz in Victoria Colony Goldfields. 
Taken from R. B. Smith’s ‘ Goldfields of Victoria,’ royal 8vo, 1SG9, p. 543. 
Weight of each stamp-head. 
(1) Ballarat district 
(2) Beechworth . 
(3) Sandhurst 
(4) Marybois . 
(5) Castlemaine . 
(G) Ararat 
(7) Gippsland 
Average 
lbs. 
336 
448 
560 
448 
280 
560 
oob 
to 
lbs. 
896 
868 
896 
840 
840 
784 
896 
9 
^•General average = 642 lbs. 
424 to 860 J 
Each stamp-head falls. 
(1) 
ft. 
0-583 
to 
ft. 
0-833 
50 to 
SO 
strokes 
per minute. 
(2) 
0-417 
55 
1 ,009 
I OOO 
45 „ 
80 
55 
55 
( 3 ) 
0-708 
55 
1-500 
45 „ 
72 
55 
55 
( 4 ) 
0-666 
55 
1-000 
60 „ 
80 
55 
55 
( 5 ) 
0-500 
55 
1-250 
oo 
80 
55 
55 
(6) 
0-500 
55 
0-833 
GO „ 
80 
55 
55 
( 7 ) 
0-583 
55 
0-917 
70 „ 
80 
55 
55 
Average 
0-5653 
to 
1-0951 
Average 52-143 to 
78- 
857 „ 
55 
General average 0-8302 foot and 6 5 • 5 strokes per minute. 
