Search Results
-
Industrial Instruments Model RD-B103 Solu Bridge
- Circa 1965
A Solu bridge determines the dissolved solids in water by measuring its conductivity.
Though a manufacturer's name is not apparent, this unit was probably part of the Industrial Instruments product line; U.S. patent…
-
Beckman Model LART Lightning Arrester Test Set
- 1950 – 1969
This system tests electric surge arresters, which protect transformers from power surges, like those caused by a lightning strike.
-
-
-
Beckman Model AB-4 Auto Bridge
- 1950 – 1969
- Photographer Commercial Photographic Company
- Subject Scientific apparatus and instruments, Beckman Instruments, Inc.
-
-
2 items
Beckman Model SL-3 Spiraling Lathe
- Undated
Images show the lathe both with and without the tray feed.
-
-
-
-
-
-
-
-
Beckman Model NV-1, Type DP-3 Decade Potentiometer
- 1950 – 1969
Potentiometers regulate the flow of electricity, like the volume dial on a radio. In 1940, Arnold O. Beckman was unsatisfied with dials on the market, so he designed his own helical potentiometers, or helipots, for use…
- Photographer Commercial Photographic Company
- Subject Potentiometer, Beckman Instruments, Inc.
-
Potentiometer at Fixed Nitrogen Research Laboratory
- Circa 1926
General view of a Brown Potentiometer and other assorted apparatus and machinery used at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Potentiometers are used to…
-
Assembly of apparatus for sterile plant cultures
- 1930-Jan-08
Close-up view of the assembly of an apparatus used for sterile cultures of taller green plants at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen…
-
Sterile culture of small phanerogams at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Close-up view of a sterile culture of small phanerogams, also known as spermatophytes or seed plants, at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. The…
-
Alsike clover plant at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
Close-up view of an alsike clover plant at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C. Notably, the root of the plant is growing from the pedicel (i.e. the stem…
-
Dr. Burk and Mr. Lineweaver with microapparatus for studying bacterial nitrogen fixation
- 1930-Jan-08
General view of the microapparatus and assorted laboratory equipment used to study bacterial nitrogen fixation at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.…
-
Warburg-Barcroft microrespiration apparatus
- 1930-Jan-08
Close-up view of the Warburg-Barcroft microrespiration apparatus used to study bacterial nitrogen fixation at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The…
-
Apparatus used to grow plants at the Fixed Nitrogen Research Laboratory
- Circa 1927-Jul-26
General view of an apparatus used to grow plants under sterile conditions at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen Research Laboratory…
-
Assorted apparatus in the Steel Corrosion Laboratory
- 1930-Jan-08
General view of assorted apparatus used in the Steel Corrosion Laboratory at the U.S. Department of Agriculture's Fixed Nitrogen Research facility located in Washington, D.C. Apparatus include a constant volume…
-
Thermostat used in steel corrosion tests
- 1930-Jan-08
Close-up view of the thermostat used to maintain ammonia bubbles at sixty-five degrees Celsius during steel corrosion tests at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in…
-
Hydraulic pump at the Fixed Nitrogen Research Laboratory
- 1930-Jan-08
General view of the hydraulic pump used to perform steel corrosion tests at the U.S. Department of Agriculture's Fixed Nitrogen Research Laboratory located in Washington, D.C.
The Fixed Nitrogen Research Laboratory…
