Heliostat
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"Heliostat"}, "metadata_usage": {"access": "CC0"}, "data_source": "National Museum of American History"}, "indexedStructured": {"date": ["1900s"], "object_type": ["heliostat"], "name": ["Duboscq, Jules"], "topic": ["Scientific apparatus and instruments", "Science", "Optics", "Mathematics"], "online_media_type": ["Images"]}, "freetext": {"setName": [{"label": "See more items in", "content": "Medicine and Science: Physical Sciences"}, {"label": "See more items in", "content": "Science & Mathematics"}, {"label": "See more items in", "content": "Optics"}], "date": [{"label": "date made", "content": "ca 1900"}], "identifier": [{"label": "ID Number", "content": "PH.315433"}, {"label": "accession number", "content": "217544"}, {"label": "catalog number", "content": "315433"}], "notes": [{"label": "Description", "content": "A heliostat throws sunlight where it might be used for photography or scientific observations. This unsigned example consists of a rectangular mirror with rounded corners that is mounted in a metal frame and supported on a tri-leg base. It has no clockwork, but it does have tangent screws for turning the mirror around its vertical and horizontal axes. Several manufacturers offered \u00e2\u0080\u009claboratory heliostats\u00e2\u0080\u009d of this general design."}, {"label": "Description", "content": "Ref. Soci\u00c3\u00a9t\u00c3\u00a9 Genevoise, <i>Illustrated Price List of Physical and Mechanical Instruments</i> (Geneva, 1900), item 2120, pp. 85-86."}, {"label": "Description", "content": "Max Kohl, <i>Price List No. 50, Vol. 1</i> (Chemnitz, n.d.), pp. 34-35."}, {"label": "Location", "content": "Currently not on view"}], "creditLine": [{"label": "Credit Line", "content": "U.S. Military Academy"}], "name": [{"label": "maker", "content": "Duboscq, Jules"}], "topic": [{"label": "subject", "content": "Science & Scientific Instruments"}], "physicalDescription": [{"label": "Measurements", "content": "overall: 23 1/2 in; 59.69 cm"}, {"label": "Measurements", "content": "mirror: 14 in x 8 in; 35.56 cm x 20.32 cm"}, {"label": "Measurements", "content": "overall: 17 7/16 in x 11 in x 14 in; 44.29125 cm x 27.94 cm x 35.56 cm"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "heliostat"}]}}, "url": "edanmdm:nmah_1462003", "hash": "ceb3a74d7a9dba830c77e202a3ab1ba4cf0f2138", "docSignature": "f83d10789708d7a9673b4e1559dfd209", "timestamp": 1663782496, "lastTimeUpdated": 1653680591, "title": "Heliostat"}