Gas-producing Area.—In that part of Ontario lying south and west of a line drawn from Toronto to Collingwood, operations in search of gas and petroleum have been carried on for a number of years. They have resulted in the discovery of two gas-producing areas of considerable extent, viz, that in Essex county, in the vicinity of Kingsville and Ruthven, and that in Welland county, in the neighborhood of Sherkston. Nor are the wells of these two fields the only producing ones, for many isolated borings, such as those at Cayuga, Dunnville and Mimico, afford no inconsiderable flows.
Oil-producing Area.—Petroleum has unfortunately been found in commercial quantities in but one county, that of Lambton, where there are two distinct pools, known as the Oil Springs and Petrolea fields. These pools have been drawn upon continuously since 1862, when the first flowing well was struck, in . . .