362 J. Gibson—Salt deposits of Ontario. 
groups into carboxyl may succeed, though, after the experience 
of Ascher* with sulphoterephtalic acid, this is hardly probable. 
I have already stated that the object of undertaking the oxi- 
dation of the amides of sulphotoluenic acids was to open another 
road with the hope of arriving in the end ata method for the 
preparation of orthosulphobenzoic acid; I also stated that this 
object was not attained. Orthosulphotoluenamide still contain- 
ing some of the paramide, was subjected to oxidation. It was 
immediately noticed that, as in connection with the sulpho-acids, 
the action in this case was not as violent as in the case 
ethereal extract, on being distilled, left behind a residue consist- 
ing of orthosulphotoluenamide with a very little parasulpha- 
minbenzoic acid. The latter can be readily removed by redis- 
solving the whole in water, adding a little alkali to the solution, 
and then again extracting with ether. In this way absolutely 
pure ortho-amide can be obtained. This was again subjected 
to oxidation, and, after treating for a length of time, no new 
product could be discovered in the liquid—a portion of the 
substance only having been destroyed. Thus we see that the 
conduct of the ortho-amide is exactly analogous to that of the 
corresponding sulpho-acid; and this serves to strengthen the 
conclusion drawn in regard to the conduct of ortho-compounds 
in oe toward oxidizing agents. : : 
he points which have been left unsettled thus far 1n- this 
investigation will be considered in a second paper on a basis of 
experinents. 
Williams College, Mass., December, 1872. 
Art. XLL—The Salt deposits of Western Ontario; by JOHN 
Gisson, B.A.,; Principal of the Almonte High School, Ont. 
Extent of the Salt-bearing area.—The superficial area of the 
Ontario salt deposits is comparatively small. Its northern, 
northeastern, eastern and southeastern limits seem to be pretty 
clearly definable by means of the numerous artificial perfora- 
the Province. From such observations it fear that the 
whole salt-bearing district may be included within the counties 
of Huron and Bruce. These portions of Ontario lie along - 
* Annalen der Chemie u. Pharmacie, clxi, 3. 
