72 THE CANADIAN NATURALIST. [Yol. vi. 



Upon this latter, at Kincardine, thirty miles north-east of 

 Goderich, another well was sunk last year, and showed the exist- 

 ence of the salt-bearing stratum at a depth of about 900 feet. 

 The record of the boring furnished me was as follows : 



Ft. In. 



Sand and gravel 91 6 



Limestone and hard strata 508 6 



Red shale 23 



Blue shale with a red band 117 



Limestone 30 



Blue and red shale, partly very soft 125 4 



Rock salt 13 8 



909 



By comparing the above result with that obtained in the first 

 well at Goderich, it will be seen that while the amount of shaly 

 strata from the base of the limestone to the bottom of the salt 

 was only 205 feet at Goderich, it attains at Kincardine a thickness 

 of 309 feet ; in which, however, are included thirty feet of a rock 

 described as limestone, but which may perhaps be gypsum, masses 

 of which were encountered in the shales in boring at Goderioh. 

 Of the 775 feet of limestone belonging to the formation at Gode- 

 rich, only 508J- remain at Kincardine, the upper portion being 

 removed by erosion. It is not, however, certain that the original 

 thickness of the Onondaga, or Salina formation as it is sometimes 

 called, was precisely the same here as at Goderich, and thus the 

 amount which has been removed by erosion may be somewhat 

 greater or less than would at first appear. In like manner, the 

 thickness of the same formation at Clinton may differ somewhat 

 from that at Goderich, so that the overlying portion of Cornifer- 

 ous limestone at that place may be greater or less than 200 feet, 

 according as the volume of the Salina formation is less or greater 

 than at Goderich. Careful examinations of future borings would 

 enable us to determine these important points, and for this end 

 samples of the material extracted at intervals of fifteen or twenty 

 feet, should be carefully preserved. 



The base of the Onondaga formation comes to the surface at 

 the mouth of the Saugeen river. Here, at Southampton, an ill- 

 advised attempt was last year made in search of salt by boring. 

 According to the record furnished me, the solid rock was only 



