Photograph of a watertank in front of excavated temple at Mohenjo Daro. Oldest known use of bitumen as a damp cource, 3,000 BC. Photograph copied from a book.
Close up view of upland moor near Denekamp, Netherlands showing 'Erica' sp. (Heather) and 'Juniperus' sp. Near Denekamp, Netherlands. Monday, August 23, 1960.
Marilyn Truscott of Glidden, Saskatchewan, a PhD candidate in geological sciences at the University of Saskatchewan, makes use of an electron probe x-ray microanalyzer. Mrs. Truscott uses the machine to analyze samples of volcanic rock from the Sweetgrass Hills in Montana. She is obtaining information that will help provide a more complete picture of the geological history of the Western Plains.