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fyftem : for, my Lord, it is not only the immenfe 
quantities of marine remains, difperfed in all terref- 
trial ilrata, which are to be confidered (that circum- 
stance alone might give fome reafoning to their fyftem 
of partial deluges), but the following more weighty 
circumftances are likewife to be added and flung into 
the fcale, i°„ The heavings, difplacings, trappings, 
and breaks of the metallic veins, and the loads of rub- 
ble, met with at vaft depths, and where no marine 
remains were ever found j and fuch heavings, &c. are 
not rare in metallic or mineral works: of which, 
to give your Lordfhip an idea, I have presumed to 
iketch the following plan of fuch a phenomenon. 
Thefe crofs-loads are not unfrequent in the mines on North 
Downs, near Redruth, in Cornwall. Wheal-Widden copper- 
work there, in 1 7 50, was about 60 fathom deep. The load 
was 20 feet over ; and has many crofs-loads two or three feet 
over, which fometimes heave the metallic load from one to five 
or fix fathom. Thefe crofs-loads are generally filled with frag- 
ments of ftone, minerals, and other rubble. 
Vol 50. Hh 
2°, If 
