290 



The Eev. Dr. F. Smtthe read a paper on the occurrence of 

 PUcatula Icevigata in the Middle Lias of Churchdown Hill. 

 The discovery of this fossil is of importance as bearing on the 

 correlation of the same beds in England and on the continent 

 of Europe, where, as in Normandy and elsewhere, it has been 

 found in abundance ; while Dr. Smtthe has been the first to 

 identify it in this country. 



The Third Field Meeting was held at 



PURTON, 

 on Tuesday, 1 8th July. 



The members assembled at Purton Station on the line of the 

 Great Western Railway, where they were met by Major 

 Prowee, and proceeded in carriages to Purton Spa, about a 

 mile distant, where they were met by Mr. Sadlee, F.R.C.S., 

 the proprietor of the Spa, who gave them much interesting 

 information respecting its origin and uses. The spring appears 

 to have been called " Salt's Hole," and is known to have been 

 resorted to for the cure of diseases for more than 200 years. 



The water issues from the earth at a uniform temperature of 

 about 59°, and is charged with about 51 cubic inches of carbonic 

 acid gas to the gallon, besides containing valuable salts of 

 iodine and bromine, with sulphates of magnesia and soda, and 

 carbonate of potass. Much of the water is used on the spot, 

 and large quantities are bottled and sent to a distance. 



From Purton Spring, the members of the Club proceeded to 

 a quarry in the outskirts of the village, to examine a good 

 section there presented in the Coralline Oolite, where a good 

 list of fossils was obtained. 



A move was then made to Ringsbury Camp, where the Club 

 was met by the Rev. W. H. E. McKnight, who gave much 

 interesting information on the nature and extent of these 

 curious earthworks. Mr. McKnight gave it as his belief that 

 Ringsbury Camp forms part of the vast system of defence which 

 surrounds Avebury, and that the question of the age of 



