Figure 1 (IMAGE) Tohoku University Caption An experimental setup of sliding friction test for MLB ball leather sheet with seam (a) and MLB ball leather sheet without seam (b). c-e Finger conditions: no application (c), rosin application (d), and sticky-substance application (e). Credit Takeshi Yamaguchi Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.