Letter from H.R. Onnes/Brief van H.R. Onnes.
Rough outline: Letter from H.R. Onnes to a colleague chemist in Arnhem about the ‘Berliner Berichte’ (1873) in which Tiemann explained the nitric acid formula and with whom Onnes fundamentally disagrees, so he explains in this letter. 1873.
Measurements: 212 x 134 mm
Condition: Age-related discolouration and some foxing.
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