Search Results
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Beckman Helipot Potentiometer Model SA1400A
- Undated
Black finished cylindrical casing with three copper electrodes in a line next to product inscription; nickel knob is raised above the cylinder; outer dial goes from 0-15 (but only three digits are visible through its…
- Manufacturer Beckman Instruments, Inc.
- Subject Electric apparatus and appliances, Electricity, Potentiometer, Beckman Instruments, Inc.
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Beckman Model G Glass Electrode pH Meter
- Undated
Self contained pH meter with wooden exterior; hinged lid opens to reveal meter face and inlaid paper instructions for use; the dial is calibrated from pH 0 to pH 13 in .1 pH divisions; porcelain enamel lined electrode…
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Beckman Model M pH Meter
- Undated
Wooden box with handle at top and metal latch closure at front; interior: instructions for use printed on paper and inset into box lid; top face: window at center reveals pH scale "7-14" and millivolts "0-400"; control…
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Bunsen Burner
- Undated
An icon of experimental chemistry, as well as a standard piece of equipment in scientific laboratories and high school classrooms alike, the Bunsen burner was built in 1854 by Peter Desaga, an assistant in German…
- Subject Bunsen burner
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Bunsen Burner
- Undated
An icon of experimental chemistry, as well as a standard piece of equipment in scientific laboratories and high school classrooms alike, the Bunsen burner was built in 1854 by Peter Desaga, an assistant in German…
- Subject Bunsen burner
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Humboldt Meeker Burner
- Undated
Meeker burners function the exact same way as Bunsen burners except that they are used for objects that require a wider flame base. The Meeker burner can produce more heat than a Bunsen burner and features a distinctive…
- Manufacturer Humboldt Manufacturing Company
- Subject Bunsen burner, Meeker burner, Humboldt Manufacturing Company
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Iron Gas Burner
- Undated
Iron gas burner for the production of small glassworks; ball and socket rotatable neck; two flame adjustment knobs; three-pronged foot. Adjusting the two knobs on the burner allows for the user to dial in the exact…
- Subject Glass blowing and working, Gas-burners
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Manual Variable Resistor Box
- Undated
Variable resistors are also known as potentiometers. Potentiometers are used to measure electromotive force (emf) by balancing it with a known emf. The concept was first developed in 1841 by J. C. Poggendorff and…
- Manufacturer Siemens & Halske
- Subject Variable Resistor, Potentiometer, Siemens & Halske
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2 items
Nalcometer Serial No. 1164
- Undated
Wooden box with metal instrument inside; instructions attached to top of box; instrument has a gauge and three turnable knobs; space along side has a power source and an electrode that is used for measuring; plaque on…
- Manufacturer National Aluminate Corporation
- Subject National Aluminate Corporation, Nalcometer
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Potentiometer
- Undated
Potentiometers are used to measure electromotive force (emf) by balancing it with a known emf. The concept was first developed in 1841 by J. C. Poggendorff and improved throughout the 19th century by Latimer Clark and…
- Manufacturer Leeds and Northrup Company
- Subject Potentiometer, Leeds and Northrup Company
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Precision Scientific Meeker Burner
- Undated
Meeker burners function the exact same way as Bunsen burners except that they are used for objects that require a wider flame base. The Meeker burner can produce more heat than a Bunsen burner and features a distinctive…
- Manufacturer Precision Scientific Company
- Subject Bunsen burner, Precision Scientific Company, Meeker burner
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Sunderman Model RCM14B Direct Reading Type Conductivity Bridge
- Undated
Wooden box with black metal instrument panel; four padded metal feet on bottom; leather handle attached to side with two nickel connectors; nickel lock on side of base and lid; lid connects to base via two coated metal…
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Test Tube Rack
- Undated
Rectangular wooden apparatus for holding fifteen test tubes upright. Heavy tape has been attached to all four sides.
- Subject MacDiarmid, Alan G., 1927-2007, Test tubes
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2 items
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Variable Capacitor
- Undated
Tall rectangular wooden base with black plastic instrument panel; instrument panel is attached to base via four metal screws, two on each side; two small black plastic knobs that adjust up and down as they are turned…
- Manufacturer Leeds and Northrup Company
- Subject Variable capacitors, Leeds and Northrup Company
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Variable Resistor
- Undated
Variable resistors are also known as potentiometers. Potentiometers are used to measure electromotive force (emf) by balancing it with a known emf. The concept was first developed in 1841 by J. C. Poggendorff and…
- Manufacturer Leeds and Northrup Company
- Subject Variable Resistor, Potentiometer, Leeds and Northrup Company
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Weston Galvanometer
- Undated
Rectangular wooden box; brown leather handle attached to top with metal fasteners; front has a steel lock screwed to it; lock is stamped with manufacturer; four hard black rubber feet on bottom; top attached with two…
