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| Date: | 01 24 1938 |
|---|---|
| Description: | Engineering photograph of an experimental Farmall tractor designated as model "F-15". Right side view. |
| Date: | 12 01 1937 |
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| Description: | Engineering photograph of an experimental McCormick-Deering six wheel drive tractor with pneumatic tires. Three-quarter view towards front right. |
| Date: | 07 29 1937 |
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| Description: | Engineering photograph of an experimental Farmall tractor designated as model "F-22". Three-quarter view towards front right. |
| Date: | 05 19 1937 |
|---|---|
| Description: | Engineering photograph of an experimental Farmall tractor designated as model "F-22". |
| Date: | 11 21 1935 |
|---|---|
| Description: | Engineering photograph of an experimental McCormick-Deering six wheel drive tractor with a six cylinder engine. Three-quarter view towards front left. |
| Date: | 11 19 1934 |
|---|---|
| Description: | Engineering photograph of an experimental McCormick-Deering I-12 tractor with demountable type rear rims. Right side view. |
| Date: | 09 19 1930 |
|---|---|
| Description: | Engineering photograph of an experimental Increased Power Model 10-20 industrial tractor. Right side view. |
| Date: | 1936 |
|---|---|
| Description: | Engineering photograph of an experimental McCormick-Deering tractor with wheel covers. The tractor was apparently designed for use by the U.S. military. Th... |
| Date: | 06 30 1930 |
|---|---|
| Description: | Engineering photograph of an experimental tractor or "shop mule" identified as a "Slonniger tructor." Right side view. |
| Date: | 05 03 1930 |
|---|---|
| Description: | Engineering photograph of an experimental, redesigned Farmall tractor with 4 1/4" x 5" engine. Left side view. |
| Date: | 02 13 1930 |
|---|---|
| Description: | Engineering photograph of an experimental 10-20 tractor with electric power take-off. Right side view. |
| Date: | 04 11 1928 |
|---|---|
| Description: | Engineering photograph of an experimental Farmall tractor with "new Bosch (no battery) lighting system." Right side view. |
| Date: | |
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| Description: | Engineering photograph of an experimental McCormick-Deering industrial winch tractor. Right side view. |
| Date: | 04 14 1925 |
|---|---|
| Description: | Engineering photograph of an experimental McCormick-Deering tractor with fenders apparently designed for use in orchards or groves. Left side view. |
| Date: | 10 16 1945 |
|---|---|
| Description: | Slightly elevated view of men and women sitting around a table, sampling slices of Oscar Mayer meat products in the Oscar Mayer laboratory. A women in a lo... |
| Date: | 10 16 1945 |
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| Description: | Slightly elevated view of five women workers in an Oscar Mayer Company test kitchen and laboratory. A low wall is separating two women working at desks on ... |
| Date: | 11 10 1937 |
|---|---|
| Description: | Three male workers testing the "Clean Easy Milker" milking machines at the Ben H. Anderson Mfg. Company, 3220 Atwood Avenue. |
| Date: | 06 23 1936 |
|---|---|
| Description: | Slightly elevated view of the Wisconsin Department of Agriculture and Markets, Dairy and Food Division chemical laboratory, at 1 West Wilson Street. |
| Date: | 10 12 1935 |
|---|---|
| Description: | Teacher and two girls looking at rat growth chart. |
| Date: | 06 23 1933 |
|---|---|
| Description: | U.S. Forest Products engineer, George W. Trayer, in the laboratory with a plywood panel, newly developed to provide strength and durability in construction... |
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