t<KVIEWS — THE ECONOMIC MINERAI,S OF CANADA. 217 



" 1. Arnprior Geological Survey. 



" a. Striped light and dark grev marble, large pattern. 

 '' b. " " " " small patern. 



" c. " " " " cut across the beds. 



" At the mouth of the Madawaska, in McNab, a great extent of crystalline 

 limestone is marked by grey hands, sometimes narrower, and sometimes wider, 

 running in the direction of the original bedding, and producing, where there 

 are no corrugations in the layers, a regularly barred or striped pattern. When 

 the beds are wrinkled, there results a pattern something like that of a curly 

 grained wood. The colours are various shades of dark and light grey, inter- 

 mingled with white. These arise from a greater or less amount of graphite, 

 which is intimately mixed with the limestone. The granular texture of the stone 

 is somewhat coarse, but it takes a good polish, and gives a pleasing marble. Mr. 

 W. Knowles has opened a quarry in limestone of this description at Arnprior, 

 and erected a mill for the piirpose of sawing and polishing it for chimney pieces, 

 monuments and other objects. A monument of it has been erected in the 

 Mount Royal cemetery. — Laurentixtn, 



" 5. St. Arraand C. R. Cheeseman, Phillipsburg. 



" a. White marble. 



" b. White " 



" c. White " clouded with pale green. 



" d. Dove-grey marble, marked with white. 



" The marbles, of which Mr. Cheeseman exhibits specimens, occur in great 

 abundance in the immediate vicinity of Phillipsburg, on Lake Champlain. They 

 are all easily cut, and take a good polish. Should a railway, which is projected 

 between St. Johns and St. Albans, be carried into operation, it is probable there 

 would be some demand for the stone. No quarries have been opened on any of 

 the beds, and these specimens are taken from surfaces that have long been 

 exposed to the influence of the weather. — Quebec group, Lower Silurian. 



" 6. St. Armand Geological Survey. 



"a. Black marble. 



" About a mile and-a-half south-eastward from Phillipsburgh, there occurs a 

 black marble, similar to this specimen. The beds dip to the eastward at an 

 angle of about twelve degrees ; a quarry was many years ago opened on one of 

 them, which has a considerable thickness. The stone was exported to the 

 United States, and much esteemed in New York, but the opening of quarries of 

 black marble at Glen's Falls, where there is a great water-power, interfered with 

 the demand, and caused the enterprise to be abandoned. — Quebec group, Lower 

 Silurian.'^ 



Another most important product is roofing slate. What follows 

 relates to the Walton Quarry. Specimens from other localities are 

 exhibited by the geological survey. 



