Cathetometer
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The form was introduced in Paris around 1815 and the name around 1847. The U.S. Military Academy, which owned this example, acquired much of its physics apparatus from Paris."}, {"label": "Description", "content": "Ref: D. J. Warner, \u00e2\u0080\u009cCathetometers and Precision Measurement: The History of an Upright Ruler,\u00e2\u0080\u009d <i>Rittenhouse</i> 7 (1993): 65\u00e2\u0080\u009375."}, {"label": "Location", "content": "Currently not on view"}], "physicalDescription": [{"label": "Physical Description", "content": "brass (overall material)"}, {"label": "Measurements", "content": "overall: 54 1/4 in; 137.795 cm"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "cathetometer"}]}}, "url": "edanmdm:nmah_1184104", "hash": "a687222251a53f7c14963659b011e2c2c91a0e80", "docSignature": "9a677e482088911da453a6dfb1b1e342", "timestamp": 1663782461, "lastTimeUpdated": 1653680532, "title": "Cathetometer"}