Credit: NIST Museum Item 0554 submitted for your bewilderment.

Much like your attic, garage or basement, the NIST archives are home to quite a number of arcane objects of unclear origin and purpose. We periodically collect these victims of misplaced paperwork and present them in a series we call "Unidentified Museum Objects." We invite you to put on your thinking caps and help us figure what these relics might be.

New Mysteries

Item 0290: The museum collection notes this is possibly a strain gauge and certainly made by the B.C. Ames Company of Waltham, Massachusetts. Their tagline is “Masters of Measurement.”

The gauntlet has been thrown.

Credit: NIST Museum Item 0290. A strain gauge? Metric wall clock? The world may never know.

Item 0304: The museum collection simply describes this one as an “unidentified metal instrument with a wire coil.” Sounds about right.

Credit: NIST Museum Item 0304. Eh, could it be a fishing rod for electric eels? Your guess is as good as ours. Probably better.

Item 0554: The face of the instrument reads “Hartmann-Kempf’s Patent,” which, when searched for, turns up a patent for a frequency-measuring instrument. Also on the face of the instrument is the name of James G. Biddle of Philadelphia. According to the Harvard Collection of Historical Scientific Instruments, the Biddle company was an importer of German instruments. Megger, which makes electric test equipment, has since bought Biddle.

Credit: NIST Museum Item 0554. It looks like it could be an electrified postage scale, but it is not.

If you’ve got any inkling of what one of these thingamabobs might be, let us know in the comments.

Mysteries Solved(?)

Not all mysteries are destined to remain unsolved. Here are a few objects from columns past whose uses have become slightly more clear thanks to the efforts of our intrepid researchers.

Item 0497: David LaVan, a mechanical engineer in NIST's Material Measurement Laboratory, took item 0497, a red glasslike shard that was featured in Unidentified Museum Objects, Vol. II, into his lab for testing. LaVan and Mark Vaudin used 2D X-ray diffraction to determine that the object is "very likely ruby." That is, the object's measurements were consistent with what you'd expect to find for a cylindrical single crystal of the gemstone ruby, LaVan said. He further notes: "Growing single crystals was an art and very important in the earlier days of many fields of optics and microelectronics. A single ruby crystal of that size and shape would likely have been used in a very early laser."

Testing item 0497 took several hours and involved overcoming several logistical challenges. A special part was custom 3D-printed to enable the object to be mounted in the X-ray diffraction instrument.

Credit: NIST Museum Item 0497

Credit: F. Webber/NIST Testing item 0497 in the X-ray diffraction instrument.

Items 0305 and 0306: John Sieber, a research chemist in the NIST Material Measurement Laboratory, writes that "Items 0305 and 0306 fit together. To me, it looks like an accessory for X-ray diffraction (XRD), where the sample sits on the white cylinder of 0305 and the two parts are assembled with the white cylinder inside 0306."

Credit: NIST Museum Item 0305

Credit: NIST Museum Item 0306

This concludes this installment of Unidentified Museum Objects. Again, if you have an idea as to what any of these things might be, let us know in the comments.

Until next time!