2 ms·
As a kid, I had this vintage science experiments book[0] that had that and helicopter-parent-forbidden chemistry experiments (ahh, the era before abuse of torts
by burntrelish1273 9y ago
As a kid, I had this vintage science experiments book[0] that had that and helicopter-parent-forbidden chemistry experiments (ahh, the era before abuse of torts). Inverted test-tube semi-submerged, filled completely with water, over each electrode to see progress IIRC.
700 Science Experiments for Everyone 1958, UNESCO, Hardcover, 221 pp.