Plate II. Shale Clay-pit at Yard of Kansas Vitrified Brick Company's Brick Plant, Chanute, showing Cross-fractures in Shale.

Plate III. Vertical Cross-fractures in Shale at Clay-pit near Brick-yard of Kansas Vitrified Brick Company's Plant, Chanute.

Plate IV. Brick Plant of Coffeyville Vitrified Brick Company, Cherryvale.

Plate V. Brick Plant of Coffeyvale Vitrified Brick Company, Cherryvale, showing Shale Mound and Steam Shovel.

Plate VI. Iola Portland Cement Factory, Autumn of 1901.

Plate VII. End View of a 300-horse-power Westinghouse Gas-engine Used in Iola Portland Cement Factory.

Plate VIII. Rock Quarry, Iola Portland Cement Plant.