Royal Geological Society of Cornwall. 2S3 



abling the Society to complete its long-promised but still very 

 defective Geological Map, members will, in their respective di- 

 stricts, endeavour to ascertain the nature and relations of the 

 rocks, and transmit their observations made, and specimens col- 

 lected, from time to time, to the Secretary, who will be very ready 

 to assist their incjuiries by any advice or information in his power. 

 Any person, even although unacquainted with the principles of 

 Geological science, can, it is obvious, collect specimens of the 

 various rocks in his vicinity ; and members are requested to bear 

 this in mind, with the assurance that collections of this kind, with 

 the various localities of the specimens affixed, will very materially 

 promote the important object in view. One grand desideratum, 

 and which might be very easily supplied by members resident in 

 the different parts of the county, — is, to ascertain the exact 

 limits of the different granite and killas districts. — The farmers 

 and miners, in any part of Cornwall, could give this information 

 to anv gentleman that would take the trouble to record it, or to 

 trace the boundary lines in any of the county maps." 

 By order, 

 Sept. 21, 1819. John Forbes, Sectretary. 



The following Papers have been read since the last Report. 



I. On the Throw of Veins. By Frederic Hall, Esq. — II. On 

 the Importance of Mineralogical and Geological Knowledge to the 

 practical Miner. By John Forbes, M.D. Secretary. — III. On 

 the Granite Veins of Cornwall. By Joseph Carne, Esq, F.R.S. 

 Hon. M.G.S. Member of the Society. — IV. An Account of the 

 Alluvial Depositions at Sandrycock. By the late P. Rashleigh, 

 Esq. — V. Observations on the Alluvial Strata of Poth, Sandry- 

 cock, and Pentuan. By John Hawkins, Esq. F.R.S. M.G.S. 

 Honorary Member of the Society. — VI. On the Precipitation of 

 Copper. By Joseph Carne, Esq. F.R.S., &c. — VII. On the 

 Geology of Saint Michael's Mount. By Dr. Forbes. — VIII. On 

 Elvan Courses. By Davies Gilbert, Esq. Vice-President of the 

 Royal Society, President. — IX. On the Intersection of Lodes in 

 the Direction of tlicir Dip or Underlie. Bv John Hawkins, Esq. 

 F.R.S., dc. — X. On the Geology of the West of Cornwall ; Part 

 second. By Dr. Forbes. — XI. Ap])endix to the above. By 

 Professor Jameson. — XII. Observations and Experiments on the 

 Construction and Use of a Safctv Bar. Bv John Ayrton Paris, 

 M.D. F.L.S. Honorary Member of the Society. — XHI. On the 

 different Processes employed in Blasting Rocks; being an Appen- 

 dix to Dr. Paris's Paper." By Dr. Forl)es. — XIV. On the Tem- 

 perature of tiie Mines of Cornwall. By R. W. Fox, Esq. Mem- 

 ber of the Society. — XV. On the Tenq)crature of Mines. By 

 Dr. Forbes. — XVI. Notice on the Geology of the Neighbouriiood 



of 



