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| Date: | 1863 |
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| Description: | Sketch of John Muir's clock design.The built clock was a combination of scythes, wheels and arrows. A rough bough of burr oak was set upon a base incrusted... |
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| Description: | Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famo... |
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| Description: | Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famo... |
| Date: | |
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| Description: | Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famo... |
| Date: | |
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| Description: | Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famo... |
| Date: | |
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| Description: | Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famo... |
| Date: | 1863 |
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| Description: | A sketch of mechanical parts for an invention. |
| Date: | 1863 |
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| Description: | A sketch of a thermometer. Quoting from Muir's autobiography "My Boyhood and Youth" he described the thermometer as "made of an iron rod, about three feet ... |
| Date: | 1863 |
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| Description: | Watercolor illustration of a barometer designed by John Muir in his boyhood. |
| Date: | 1863 |
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| Description: | Muir's illustration of a means to record time by use of a star. He titled the drawing "The star hand rising and setting with the sun all the year". |
| Date: | 1863 |
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| Description: | A John Muir sketch of a fancake draught of sawframe with crankshaft in position. Scale two inches per foot. Depth of frame 5 1/2 inches. Speed of cranks... |
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| Description: | Illustration showing the relationship of film speed, shutter speed, and aperture in photography. |
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| Description: | Sid's illustration showing the range of infrared and ultraviolet radiation and the color sensitivity of Panchromatic and Ortho films compared to human visi... |
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| Description: | Sid's illustration showing the relationship between film, a camera lens and the light controls for aperture and shutter speed in photography. |
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