The Canadian journal of industry, science and art . Fig. 196 crassicauda(HaU). Fig. ISfJ.—Ceraurtis pleurexcmthemus(Green). Some of the limestones of the Trenton Group are sufficiently fine-grained to take a good polish, and hence to be employed as these belong, more especially, a dark or chocolate-brown varietyfrom the River Mississippi in the township of Pakenham (LanarkCo.), and grey varieties from the township of Gloucester (CarletonCo.), and from Montreal. Good building stones are quarried in LaChevrotiere (the so-called Deschambaulfc stone, of which the principalbuil

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The Canadian journal of industry, science and art . Fig. 196 crassicauda(HaU). Fig. ISfJ.—Ceraurtis pleurexcmthemus(Green). Some of the limestones of the Trenton Group are sufficiently fine-grained to take a good polish, and hence to be employed as these belong, more especially, a dark or chocolate-brown varietyfrom the River Mississippi in the township of Pakenham (LanarkCo.), and grey varieties from the township of Gloucester (CarletonCo.), and from Montreal. Good building stones are quarried in LaChevrotiere (the so-called Deschambaulfc stone, of which the principalbuildings in Quebec are constructed), at Montreal, Point Claire,Mille Roches in Cornwall township, Kingston, Ox Point near Belle-ville, Cobourg, Lake Conchiching north of Lake Simcoe, and variousother localities. The Lake Conchiching stone is highly silicious,and consequently difficult to dress, although exceedingly lime is also obtained from most of the limestones of thisgroup. A thin light-coloured bed belonging to the lower part

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Keywords: ., bookcentury1800, bookdecade1850, bookpublishertoron, bookyear1856