...locality about il/2 miles east of Union City, and are utilized by the Peerless Portland Cement Company. The Antrim shales are exposed on the shore of Thunder...and also at several localities in Charlevoix County, though they have not, as yet, been used in making cement. The Saginaw shales are found in several mines...

...(CaO) 2.38 Magnesium (MgO) 78 Alkalies, etc., by difference 5. 56 Total 100.00 As remarked by Ries, the ratio of Silica to alumina in this analysis is...seems to be a possibility worthy of consideration. SAdllfAW FORMATION. The shales of the coal-bearing rocke which underlie an extensive area in the central...

...100.00 As remarked by Ries, the ratio of silica to alumina in this analysis is unusually high, but BO far as can be judged this material is worth careful...seems to be a possibility worthy of consideration. SABIKAW FORMATION. The shales of the coal-bearing rocks which underlie an extensive area in the central...

...100.00 As remarked by Ries, the ratio of silica to alumina in this analysis is unusually high, but BO far as can be judged this material is worth careful...seems to be a possibility worthy of consideration. SAQIXA W FORMA 77OV. The shales of the coal-bearing rocks which underlie an extensive area in the central...

...(CaO) 2.38 Magnesium (MgO) 78 Alkalies, etc., by difference 6. 56 Total 100.00 As remarked by Ries, the ratio of silica to alumina in this analysis is...organic matter they contain as a by-product seems to l>ea possibility worthy of consideration. SAQIKAW FORMATION. The shales of the coal-bearing rocks which...

...Calcium (CaO) 2.38 Magnesium (MgO) 78 Alkalies, etc., by difference 5. 56 100.00 As remarked by Ries, the ratio of silica to alumina in this analysis is...seems to be a possibility worthy of consideration. COLDWATER SHALE. The Coldwater shales are now being quarried at a locality about 1J miles east of Union...