All notices of any meeting of the commissioners shall be in writing or in print, or partly in writing and partly in print, and shall be by the clerk delivered or sent by the post, or otherwise, to the usual place of abode or place of business, if any, within the limits of the special Act, of each of the commissioners, two clear days at least previous to such meeting, and every such notice shall specify the time and place of meeting, and in case of a special meeting shall specify the object thereof, and no business shall be transacted at any special meeting except such as is stated in the notice thereof.