Double Mill
notes: label: Description
content: A double mill apparatus demonstrated the relation between the angle of a wing and the effect of air resistance. The form was known in the eighteenth century. Joseph Henry, the physicist who served as the founding Secretary of the Smithsonian, probably acquired this example for the Institution.
label: Description
content: Ref: Jean Antoine Nollet, Lectures in Experimental Philosophy (London, [1748]), pp. 166-167.
label: Description
content: James Ferguson, Lectures on Select Subjects in Mechanics, Hydrostatics, Pneumatics, and Optics (London, [1764]), pp. 112-113.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.314619
label: catalog number
content: 314619
label: accession number
content: 208046
objectType: label: Object Name
content: double mill
physicalDescription: label: Measurements
content: overall: 10 1/2 in x 5 in x 4 1/2 in; 26.67 cm x 12.7 cm x 11.43 cm
label: Measurements
content: overall: 10 1/4 in x 4 1/2 in x 3 13/16 in; 26.035 cm x 11.43 cm x 9.68375 cm