Photo of root system of red pine in calcareous waterlaid sand at Vivian; n.b. note Ca carbonate accumulations in lower soil these developed around old roots cf. Slide #79. Alfisol, P, C, D.
Black and white photograph of internal combustion engine with flywheel. Stamped on the face of the picture is the caption Manufactured by Russel Brothers, Fort Frances, Ontario, Canada
Black and white photograph of buildings and piled logs. The photograph could be a lumber yard in western Canada. In the far right of the photograph is a grain elevator