Search Results
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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
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Plate 32: Grenade to be shot from a kartouwe
- 1660
- Engraver Brawe, Hermann
- Publisher Schwänder, Johann Georg
- Subject Ordnance, Grenades, Explosives, Artillery
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21 items
Glucose Analyzer Operating Manual
- Beckman Instructions 83513-B
- 1969-Oct
The Glucose Analyzer was developed by James Sternberg in 1969 and was one of several very successful medical testing and analysis instruments that Beckman Instruments produced in the 1970s. Its size, speed, and price…
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Your finger and our button. The simplest way to count for RIA.
- 1976
Beckman's Biogamma Radioimmuno Analyzer was introduced in 1973. Radioimmunoassay (RIA) is a technique for measuring the antigen concentration. Known quantities of radioactive (labeled or “hot”) antigens and antibodies…
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Beckman Model 106-E Total Hydrocarbon Analyzer meter
- 1960s
Beckman Instruments, Inc. became interested in measuring, controlling, and fighting air pollution in the late 1940s and early 1950s, when company president Arnold O. Beckman became the scientific adviser to the Los…
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3 items
Plate 195: Bridge for crossing a river or moat
- 1588
Bridge composed of a boat, with extensible end sections that can be rolled out if the boat is not as long as the water is wide; additionally, the doubled-over end sections can also be unfolded for extra length.
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Plate 194: Device for setting the aim of artillery
- 1588
A set of two ruled frames is used along with plumb lines and a quadrant to record in daylight the aim of canons to be shot at night. The frames and plumb lines are then used again to aim the canon accurately in the dark…
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Plate 193: Ballista
- 1588
Composed of three large crossbows. Uses tension to launch arrows, pyrotechnic projectiles, and balls of rock, lead, and iron to defend a city or fortress.
Mechanics: hand crank; spur gear and lantern.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Ballista, Machinery, Engines of war
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3 items
Plate 192: Ballista
- 1588
Uses tension to launch arrows, pyrotechnic projectiles, balls, and rocks to defend a city or fortress.
Mechanics: roller thrust bearing; projectile throwing engine; trigger.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Ballista, Machinery, Engines of war
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3 items
Plate 191: Moveable counterweight trebuchet
- 1588
For launching rocks and fireballs to defend a city or fortress.
Mechanics: hand crank; worm and worm gear; spur gear and recessed face gear; projectile throwing engine.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Engines of war, Catapult, Machinery
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3 items
Plate 190: Counterweight trebuchet
- 1588
For filling ditches and moats with barrels, bales, sacks, and debris, and for defending a city or fortress.
Mechanics: winch; trigger.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Engines of war, Catapult, Machinery
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3 items
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Plate 188: Book wheel
- 1588
Allows user to consult a large number of books without moving or requiring a large table or amount of space. Purportedly useful to those who suffer from gout.
Mechanics: spur gears; epicyclic gear train.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Books and reading, Machinery
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Plate 187: Vase decorated with chirping birds
- 1588
Powered by concealed bellows or a person blowing into a pipe feeding into the base of the vase. Cross-section shows inner system, which relies on changes in air and water pressure to force air through hidden flutes to…
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3 items
Plate 186: Fountain with chirping birds shown in elevation and cross-section
- 1588
Decorated with birds that pipe out song. Can be constructed at various scales and made fixed or portable. Inner system relies on changes in air and water pressure to keep the water circulating and the air moving through…
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Plate 185: Portable fountain
- 1588
Cross-section shows inner system, which is identical to that used for the fountain on Plate 184. Syphon action in the descending, snake-shaped pipes starts the water-flow, and inner system relies on changes in air and…
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Plate 184: Fountain
- 1588
Pipes outwardly decorated like serpents spew water from the large vase into the basin. Can be fed by a distant natural spring or a hidden tank, provided either is at the same height as the fountain's vase. The inner…
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3 items
Plate 183: Machine for moving heavy weights
- 1588
Includes another view of the machine's gearing in the background.
Mechanics: capstan bars; worm and worm gear; rope drive.
- Author Ramelli, Agostino, 1531-approximately 1600
- Subject Machinery
