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File:Vacuum Tube for Beckman pH Meter 2006.519.jpg

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Vacuum tube for Beckman pH Meter   (Wikidata search (Cirrus search) Wikidata query (SPARQL)  Create new Wikidata item based on this file)
Photographer
Staff photographer
Title
Vacuum tube for Beckman pH Meter
Description

Vacuum tube for Beckman pH Meter, supported on a plexiglass stand.

Light-bulb shaped glass tube; majority of outer glass is covered in silver coating; top of tube has a yellowish tint and exposes inside of tube; inside of tube has a copper coil and other metal prongs; a silver cap protrudes from the tube top; bottom of tube is supported by a black plastic base; four metallic prongs/plugs extend from this base; a pliable metal wire with a loop fastener at its end is coiled around the tube. 1950s, Made by Beckman Instruments.
Date 2006
institution QS:P195,Q5090408
Accession number
2006.519
Credit line Science History Institute.
Notes Image downloaded with permission from the Science History Institute, as part of the Wikipedian in Residence initiative.
Source Science History Institute
Permission
(Reusing this file)
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Science History Institute
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depicts

Arnold Beckman

exposure time

0.125 second

focal length

12.28125 millimetre

media type

image/jpeg

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Date/TimeThumbnailDimensionsUserComment
current17:36, 3 April 2014Thumbnail for version as of 17:36, 3 April 2014429 × 750 (48 KB)Mary Mark Ockerbloom{{Photograph |photographer =Staff photographer |title = |description =Vacuum tube for Beckman pH Meter |depicted people = |depicted place = |date =2006 |medium = |dimensions =...

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