This book examines the historical development and economic significance of Canada's phosphate mines. It details the geological context, extraction methods, and the role of phosphate in agriculture and industry during the late 19th century. The work likely draws on contemporary geological surveys, mining reports, and economic analyses to present its findings.

The book's focus on a specific industrial resource in Canada suggests it was likely intended as a technical or historical account for those interested in the nation's economic development. Its publication date of 1892 indicates it would be a primary source or early historical analysis of the subject. The authority perspective would likely view it as a foundational text for understanding early Canadian resource extraction.