Standards of Length and Their Practical Application. a Résumé Covering the Methods Employed for the Production of Standard Gauges, to Insure Uniformity and Interchangeability in Every Department of Manufactures

Standards of Length and Their Practical Application. a Résumé Covering the Methods Employed for the Production of Standard Gauges, to Insure Uniformity and Interchangeability in Every Department of Manufactures