The paper by G. I. Taylor and H. Quinney investigates the latent energy remaining in metals after severe cold working, particularly through twisting. They find that more cold work can be done on a metal in torsion than in direct tension. The authors measure the latent energy by comparing the work done and the heat evolved during plastic deformation. They use a self-recording machine to measure the torque and angle of twist, and a thermocouple to measure the temperature rise. The results show that as the total amount of cold work increases, the proportion of work absorbed decreases, indicating saturation. For copper, the latent energy required to saturate it with latent energy at 15°C is slightly greater than 14 calories per gram. Using compression instead of torsion, they find that more cold work can be done, and the compressive stress increases with strain until the total applied cold work is equivalent to 15 calories per gram. The authors suggest that the strength of pure metals may depend only on the amount of latent cold work. They also compare their results with those of Farren and Taylor, finding good agreement but noting that direct loads can only provide a small fraction of the latent energy that metals can contain. Finally, they explore the connection between strength and latent energy, suggesting that the maximum strength in a metal may occur when the absorption of latent energy reaches its maximum.The paper by G. I. Taylor and H. Quinney investigates the latent energy remaining in metals after severe cold working, particularly through twisting. They find that more cold work can be done on a metal in torsion than in direct tension. The authors measure the latent energy by comparing the work done and the heat evolved during plastic deformation. They use a self-recording machine to measure the torque and angle of twist, and a thermocouple to measure the temperature rise. The results show that as the total amount of cold work increases, the proportion of work absorbed decreases, indicating saturation. For copper, the latent energy required to saturate it with latent energy at 15°C is slightly greater than 14 calories per gram. Using compression instead of torsion, they find that more cold work can be done, and the compressive stress increases with strain until the total applied cold work is equivalent to 15 calories per gram. The authors suggest that the strength of pure metals may depend only on the amount of latent cold work. They also compare their results with those of Farren and Taylor, finding good agreement but noting that direct loads can only provide a small fraction of the latent energy that metals can contain. Finally, they explore the connection between strength and latent energy, suggesting that the maximum strength in a metal may occur when the absorption of latent energy reaches its maximum.