Women assembling unidentified instruments at Beckman Instruments or one of its divisions.
The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…
A Table of Chymicall [Chemical] & Philosophicall [Philosophical] Charecters [Characters] with their significations as they are usually found in Chymicall [Chemical] Authors both printed & manuscript
- Part of The Last Will and Testament of Basil Valentine
Table of alchemical symbols. These and other symbols are common throughout alchemical literature and were used to denote some elements and compounds until the 18th century. While notation like this was mostly…