Search Results
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Mr. Merz using apparatus to determine the hygroscopicity of fertilizer materials
- Circa 1928
General view of Mr. Merz using an apparatus to determine the hygroscopicity of fertilizer materials and mixtures at the the Arlington Experimental Farm in Arlington, Virginia. Established by an act of Congress in April…
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Dick Adams using apparatus to determine the hygroscopicity of fertilizer materials
- Circa 1928
General view of Dick Adams using an apparatus to determine the hygroscopicity of fertilizer materials and mixtures at the the Arlington Experimental Farm in Arlington, Virginia. Established by an act of Congress in…
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2 items
Equipment used to produce intermediate for conversion to potassium metaphosphate
- Circa 1934
Two views of apparatus and equipment used to produce an intermediate suitable for conversion to potassium metaphosphate at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington,…
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Exterior view of the Fixed Nitrogen Research Laboratory
- 1926-Apr
General view of the exterior of the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory facility located at American University near Washington, D.C. The Fixed Nitrogen Research Laboratory (F.N.R.L.) was…
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2 items
Experimental blast furnace at Fixed Nitrogen Research Laboratory plant
- 1932-Oct-12
Two views of the No. 2 experimental blast furnace on a burden (a load, especially a heavy one) of phosphate at a U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant.
The Fixed Nitrogen Research…
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9 items
Experimental blast furnace plant during Tennessee Valley Authority operation
- 1934-Apr-05
Assorted views of the Fixed Nitrogen Research Laboratory's experimental blast furnace plant during a Tennessee Valley Authority (T.V.A.) operation.
The Fixed Nitrogen Research Laboratory (F.N.R.L.) was established at…
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Employees observing temperature inside Royster stoves at experimental blast furnace
- 1934-Apr-05
General view of unidentified employees observing the temperature inside the Royster stoves at the Fixed Nitrogen Research Laboratory's experimental blast furnace plant during a Tennessee Valley Authority (T.V.A.)…
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Personnel at experimental blast furnace plant
- 1934-Apr-05
Group photograph of personnel at the Fixed Nitrogen Research Laboratory's experimental blast furnace plant, taken at the conclusion of a Tennessee Valley Authority (T.V.A.) operation. Per notations accompanying the…
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Emptying slag ladle on No. 2 experimental blast furnace
- 1932-Oct-12
General view of a worker emptying the slag ladle on the No. 2 experimental blast furnace on a burden (a load, especially a heavy one) of phosphate at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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4 items
Hearth and crucible of No. 2 experimental blast furnace
- 1933-Jun-23
Four views of the hearth and crucible of the No. 2 experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The photographs show the hearth and…
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Flushing No. 2 experimental blast furnace at night
- 1932-Oct-12
General view of the flushing of the No. 2 experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen Research Laboratory…
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Opening cinder-notch on No. 2 experimental blast furnace
- 1932-Oct-12
General view of workers opening the cinder-notch on the No. 2 experimental blast furnace on a burden (a load, especially a heavy one) of phosphate at the U.S. Department of Agriculture's Fixed Nitrogen Research…
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No 2. experimental blast furnace on burden of phosphate
- 1932-Oct-12
General view of the No. 2 experimental blast furnace on a burden (a load, especially a heavy one) of phosphate at a U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant.
The Fixed Nitrogen Research…
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Carbon tube precipitator and spray tower
- 1932-Jan-19
General view of the carbon tube precipitator and spray tower for the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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2 items
Interior of Engine Room at the Fixed Nitrogen Research Laboratory
- 1932-Jan-19
Two views of the interior of the Engine Room at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory, with both full and partial views of the blowing engines for the experimental blast furnace.
The…
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Superstructure of No. 2 experimental blast furnace
- 1932-Jan-19
General view of the superstructure of the No. 2 experimental blast furnace, as seen from the platform of the No. 1 precipitator at a U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant.
The Fixed…
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2 items
Royster stoves at the No. 2 experimental blast furnace
- 1932
Two views of the Royster stoves used for the No. 2 experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. According to notations accompanying…
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2 items
No. 2 experimental blast furnace
- 1932-Jan-19
Two views of the No. 2 experimental blast furnace at a U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant. The individuals visible in the first photograph are identified (left to right) as Reilly;…
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2 items
General view of No. 2 furnace and stock piles
- 1932-Jan-19
Two views of the No. 2 furnace and stock piles at a U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory plant. The stock piles likely contained a mix of raw material, including greensand, leucite, coke,…
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Travis P. Hignett with blowing engines for experimental blast furnace
- 1930-Mar-21
General view of Travis P. Hignett examining blowing engines for the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
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3 items
Tapping slag from experimental blast furnace
- 1930-Mar-21
Three views of Mr. Royster (left) and Travis Hignett (right) tapping slag from the experimental blast furnace at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Mr.…
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2 items
Letter from Arnold Beckman to I. H. Lyons
- 1937-Aug-21
The letter was written during a multi-city trip, most likely in Pittsburgh or New York. Beckman discusses the cases of the instruments, and his desire to replace metal cases with wood; pricing of the instruments; and…
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2 items
Letter from Arnold Beckman to I. H. Lyons
- 1937-Aug-17
The letter discusses Beckman's scheduled meetings, marketing strategies for the pH meter, and interest in postal meters.
Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the…
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Plate 157: Screw-jack for breaking the iron gratings of a portcullis
- 1588
Can be operated by a single person, easily and with little noise.
Mechanics: wrenches.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Jackscrews, Machinery
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Plate 39: Petard
- 1660
Fig. 89: Diagram of the proportions of a large petard.
- Engraver Brawe, Hermann
- Publisher Schwänder, Johann Georg
- Subject Ordnance, Explosives, Artillery