George Henry Falkiner Nuttall (1862–1937) was an American-British bacteriologist who made significant contributions to various aspects of medicine. In this book, which was first published 1904, Nuttall provides a record of investigations carried out in the Pathological Laboratory of the University of Cambridge, chiefly during 1902. The text presents a demonstration of blood relationships among animals by means of the precipitin test for blood. A bibliography is also included. This book will be of value to anyone with an interest in haematology and the history of science.