Ferber, Johann Jacob.

Ibid. Beschreibung des Quecksilber-Bergwerks zu Idria in Mittel-Cräyn. Berlin: Christian Friedrich Himburg, 1774, first edition, 8vo, 4 folding engraved plates on three leaves, the first handcoloured, contemporary boards, a little marginal spotting

Condition is described in the main body of the cataloguing, where appropriate
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Ferber (1743-1790) was a Swedish mineralogist who had studied under Cronstedt, Linnaeus, and Bergmann, with the latter of whom he wrote Sciagraphia Regni Mineralis. He taught in St Petersburg, where he held a chair in natural history offered him by the Empress Catherine II, although he declined the offer of the directorship of the mines of Siberia. He later taught in Berlin before settling in Switzerland as advisor on mining operations. His geological surveys in various European countries are all pioneering works.