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| Date: | 12 04 1931 |
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| Description: | Technicians administer a lie detector test at District Attorney Fred Risser's office to be used in the James Corcoran poisoning case. |
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| Description: | Workers hand wind filament on transformers at Thordarson Electical Manufacturing Company. Chester Thordarson was a Chicago inventor and manufacturer of el... |
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| Description: | Workers get transformers ready for distribution in the shipping department at Thordarson Electical Manufacturing Company. Chester Thordarson was a Chicago... |
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| Description: | Speed presses stamp out core laminations for transformers at Thordarson Electical Manufacturing Company. Chester Thordarson was a Chicago inventor and man... |
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| Description: | The general press room is where sheet metal is made into housing for transformers, and fibre and bakelite insulators are formed at Thordarson Electical Man... |
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| Description: | Workers construct a 1,000,000 volt coil at Thordarson Electical Manufacturing Company. |
| Date: | 02 08 1955 |
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| Description: | Electrician feeding cable into the electrical box on the north second floor hallway of th Wisconsin Historical Society. Changes in the library delivery are... |
| Date: | 09 19 1941 |
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| Description: | Factory workers use a crane mounted on a truck to unload a transformer on the loading dock of International Harvester's St. Paul Works. Original caption re... |
| Date: | 1940 |
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| Description: | Factory worker at International Harvester's Indianapolis Works (Truck Engine Works). Original caption states: "Plug in type ammeters prove to be better pro... |
| Date: | 09 14 1938 |
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| Description: | Men working outdoors at a sawmill powered by an International PD-80 Diesel power unit purchased by the A.B. Carroll Lumber Company. |
| Date: | 1938 |
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| Description: | An International PD-80 diesel power unit used to power an A.B. Carroll Lumber Company sawmill. Several men are at work on the site; trees, and what appears... |
| Date: | 1938 |
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| Description: | Interior view of a fishing boat powered by an International PD-40 power unit and owned by Julius Dettloff. A man stands at the boat's wheel. |
| Date: | 06 21 1938 |
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| Description: | Men gather around International PD-80 Diesel power units as they set them up on a drill rig. |
| Date: | 10 12 1938 |
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| Description: | Men work with a Universal crusher, used to crush 400 yards of gravel in 8 hours. The crusher was powered by an International PA-100 power unit owned by E.F... |
| Date: | 06 21 1938 |
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| Description: | Men set up a Wilson double-drum spudder made by Wilson Manufacturing Company, and an International PA-100 power unit at a well owned by Cato Oil Company, I... |
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