In "The North American Slime-Moulds," Thomas H. Macbride presents a meticulous exploration of these fascinating organisms, characterized by their unique life cycles and ecological significance. Written in the early 20th century, Macbride's work combines rigorous scientific observation with lyrical prose, making the intricate details of slime-mould biology accessible to both scientific and lay audiences. This treatise serves not just as a taxonomic account but also as an invitation to appreciate the complex interplay of these organisms within their environments, reflecting the burgeoning interest in mycology and biodiversity at the time. Thomas H. Macbride, an eminent botanist and professor at the University of Iowa, was driven by a profound curiosity about the natural world. His academic journey and research experiences shaped his expertise in the field of mycology, where he devoted much of his career to studying slime moulds. Macbride's passion for documenting and categorizing flora and fauna was framed by a broader context of scientific exploration during a period rich in discovery and professional diversification within the natural sciences. This essential volume is highly recommended for students, researchers, and enthusiasts of mycology and biodiversity. Macbride's keen insights and articulate observations offer readers a deeper understanding of slime-moulds and their ecological roles, making this book a valuable addition to any natural history library.