X¢CV1il 
Cornish, Mr. T. Cornish (Penzance), Mr. W. G. Dix, Rev. E. N. 
Dumbleton, Mr. Heard, Capt. Henderson, Rey. W. Iago (Bodmin), 
Mr. H. Spry Leverton, Mr. A. P. Nix, Mr. A. Paull, Mr. J. R. 
Paull, Mr. W. J. Rawlings (Hayle), Mr. E. Sharp, jun., Mr. M. 
H. Smith, Mr. Tweedy, Capt. Veitch, R.E., Mr. Whitley, C.E., 
and Mr. R. N. Worth. 
The special object of the meeting was to listen to descriptions 
of some of the characteristics of the district visited during the 
Autumn Excursion. 
Mr. WHITLEY read a Paper descriptive of the physical geo- 
graphy of that locality, in the course of which he traced its geolo- 
gical history, and advanced arguments in support of his views 
with regard to the occurrence of drift in the western counties. 
Captain HENDERSON read a very interesting Paper upon the 
famous Botallack mine, illustrating his descriptions by means of 
his admirable maps and sections of the sett and its workings. Mr. 
Henderson stated that he was under great obligation to the West 
Briton of the 24th of August last for much of the information 
which he had obtained respecting Botallack mine, and the work- 
ings thereon. From the account there given he made some 
interesting extracts. The mine was situated at and near the 
junction of the granite and killas, the latter being represented by 
rock of a very compact character. The granite had generally 
produced tin with a little copper; the killas large quantities of 
copper with some tin. In all, the ores of seven metals had been 
raised there ; with perhaps a greater variety of minerals generally 
than in any other mine in Cornwall. The principal lode was 
called the Crowns, which was a guide or crosscourse. On it the 
famous Boscawen shaft, which extended under .the sea, was 
situated ; and at the junction with it of the other lodes the great 
mineral riches of the mine had been developed. ‘The deepest 
levels of the under-sea part of the mine were so free from water 
that one hour’s work a day with a bucket sufficed to keep them 
perfectly dry. In Wheal Cock, now a part of the Botallack sett, 
a miner had followed up the lode so near the sea that he drove 
his pick right through. The water rushed in, but he was not at 
all alarmed, and stopped the hole with a plug of wood, which, 
after fifty years, still remained. Botallack was divided into 200 
shares, held by 84 adventurers, all resident in the county. .It 
employed 700 hands, and had 156 heads of stamps (108 steam), 
and 14 steam engines. 40,000 tons of stuff were drawn to the 
surface every year, of which 27,000 were more or less available. 
Seven miles of levels and stopes were driven every year. In the 
quarter ending June last the expenditure was £8,212, and the 
