This 1939 information bulletin describes tests undertaken by the Dominion Forest Service of Canada to evaluate mechanical properties and strength of animal (hide) glues used commercially (industry, manufacturing) for joining wood. Factors affecting strength include quality (grade) and source (eg. hide, skin, bone, trimmings, etc.) of glue, viscosity, jelly strength, preparation concentration, temperature, humidity, pressure, thickness, setting time, etc. Other topics discussed include: addition of preservatives to prevent bacterial attack, adhesion, color, crazing, glue-water ratios, tensile strength of films, solution preparation, application, shear strength, agitation, absorption, pH, elasticity, etc. Test data and results are illustrated by numerous tables and graphs. References date from 1902-1935. This article is a reference for woodworking, proteinaceous adhesives, and the conservation of furniture and wooden objects.