THE HAMILTON ASSOCIATION. 39 



foreign to the species to which the substance belongs (Dana). In 

 the case of the only one seen by me in Canada, it occurred in the 

 Hancock Quarry at the head of the Jolley Cut. It assumed the 

 primary cubic shape of a Fluor Crystal, and was enclosed in 

 Dolomitic Limestone. Probably the original Fluor disappeared, 

 and the space it occupied was refilled by infiltration of the matter. 

 Sulphur Springs are very common in this district. One which was 

 tapped in the waterlime beds of Russeaux Creek, two or three years 

 ago, left a large deposit of the Malodorous substance there. 



Mr. Carpenter formerly opened a quarry on the Barton and 

 Glanford road, a few miles in rear of the escarpment, for road metal. 

 Unfortunately it has long since been abandoned. To a few of us in 

 Hamilton it was known as " the Barton Mineral Quarry," and we 

 thought it richly deserved the distinction, owing to the large number 

 of small, but beautiful, Fluor Crystals, as well as various minerals 

 occurring in limestone pockets. The former (wine-red, sky-blue, 

 white, etc.) were exceedingly briUiant, and had so much the appear- 

 ance of real gems that Dr. Spencer and the writer had some difficul- 

 ty in convincing the farmers' sons about the place that they were not 

 the genuine articles, and were deficient in hardness. They were so 

 much admired by visitors that I gradually gave away my entire col- 

 lection, and found, by accident only, one poor specimen remaining, 

 which 1 placed in a museum case. One of the minerals found was 

 recognized by Dr. Spencer as Elastic Bitumen. He mentioned that 

 it was considered very rare, and on reference to Dana I found he 

 credits only three places with its possession, viz. : a lead mine in 

 Derbyshire, England ; a coal mine in Montrelais ; and at Woodbury, 

 Ct., in a bituminous limestone. Mineral tar was another strange 

 production there. Dr. Spencer mentioned it in a paper, but he did 

 not venture on any theory regarding its origin. It was found in 

 pockets also. I noticed there an unusual number of crushed 

 Cephalopods, so completely flattened by over-pressure that it was 

 altogether impossible to form any idea regarding the species when- 

 ever four or five were found massed together irregularly — some lying 

 across others and all presenting the pecuHar appearance of the 

 Mount Bolca Fishes I had previously examined in Europe. I found 

 whenever a pocket in the limestone underneath occurred, it was 

 almost invariably filled with mineral tar (bituminous matter), and 



