"Text-book of Embryology," published in 1914, provides a comprehensive overview of the field of embryology as it was understood at the beginning of the 20th century. Authored by Walter Heape, E. W. MacBride, and John Graham Kerr, this volume serves as an invaluable resource for understanding the historical development of embryological science. The book details the processes of animal development, offering insights into both vertebrate and invertebrate embryology. It will be of significant interest to historians of science, biologists, and anyone interested in the early understanding of developmental processes. Its enduring value lies in its detailed documentation of early scientific methodologies and observations.