foreign infiltrations. The minerals are cutated. It is quite plastic. Burns to a handsome flesh color. Dried at 212° F. Silica 62.56 64.566 62.58 Alumina 24.78 20.16 22.94 Iron peroxide 1.80 4.20 3.76 Lime Trace .213 .56 Magnesia .317 .641 .425 Potash 3.276 5.054 5.28 Lime .294 None .308 Combined H2O+ 6.973 5.166 4.147 No. No. No. 2168 2169 2170 Madison continued Marly shales of Madison Co. 2186, page 52, 4th Rept. Marly shale, in the road near A. Lakes place. Drum- mig creek. Niagara group. Our dive peg is brownish grey, somewhat firm shale, mottled in parts. Quite plastic with water when powdered. Calcines to a light brick color. 2187. Marly shale or indurated marly clay, on the hill 200 ft. due south of Dr. Free- man's house. Probably the same bed as No. 2170, be- neath the Canifer and lowest one. The bed is 6 ft. thick in some parts. And contains gypsum. In R. Miller Generally in thin soft; irregular laminated, of a light olive-grey color, irregularly varied with brownish yellow and a ochreous. Contains gypsum in irregular crystals. Is quite plastic in the water. Burns quite hard, of a handsome light brick color.