(Leipzig, 1879). From ""Annalen der Physik und Chemie."" pp. 541- 544 and 1 lithographed plate. From the library of H. Becquerel with his small paperlabel pasted on front with the booknumber ""B 1916"".
First edition.
(München, 1879). From ""Sitzungsberichte...München"" pp. 147-170 and 2 folded lithographed plates. From the library of H. Becquerel with his small paperlabel pasted on front with the booknumber ""B 1917""
First edition.