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Address to the Cotteswold Naturalists' Field Club hy the President, 

 Sir W. V, Guise, Bart., F.L.S., F.G.S., read February 23rd, 

 1871. 



THE ANNUAL MEETING OF THE CLUB 



was held at the Spread Eagle Hotel, Gloucester, on Wednesday, 

 the 23rd of February, when the President's Address was read, 

 and you were again pleased to testify your continued con- 

 fidence by re-electing me to the honourable office of President 

 of the Cotteswold Field Club. Mr. T. B. LI. Baker, Dr. 

 Wright, and Mi'. Lucy being chosen Vice-Presidents, and Dr. 

 Paine, Secretary. 



After the conclusion of the official business, two papers were 

 read by Professor Church, of the Agricultural College, Ciren- 

 cester, the first " On the Analysis of certain Oohtic Eocks," 

 the second " On the Colouring Matter in the wings of certain 

 Birds." In illustration of the first paper the learned Professor 

 exhibited four examples, of which No. 1. was a white rock of 

 extreme hardness and closeness of texture, derived from the 

 upper beds of the Great Oolite ; this was found to be almost a 

 pure carbonite of lime containing nearly 95 per cent of that 

 mineral and only 5 per cent, of silica. This stone was used by 

 the Eomans for tesserae, both at Cirencester {Corinium) and 

 Uriconimn, and is the same which at Bussage has yielded the 

 remarkable form of Pachyrisma grande, which is limited to that 

 stratum. No. 2.— A Calcareous Sandstone, miscalled " Chert," 

 from Sandy Lane, near Cirencester, was found to contain 55 per 

 cent, of sihca and 42 per cent, of lime. No. 3.— A Clay of a 

 s 



