Signature mark | NL 174/4099 |
---|---|
Subject | Glasplatte, Negativ (?) |
Title | Unbekannt. Evtl. Versuche zur Funkenentladung. Beschriftet mit: "a, b; (?)" |
Date | o.D. |
Formal information |
Format (HxB):
11,5x13,7 cm |
Rights notice | CC BY-SA 4.0 |