1830 Architecture of Manufactories in French - 2 Studies on Ammonia Salts

9.5" x 13" hand laid paper with 7.5" x 11" copper engraved study in fine condition. Dis-bound from a book, with signs of so along one edge. tanned along opposite edge, but neat and clean engravings as seen. Bound with period border and title in French along bottom . Ex-Libris from Ware Memorial Library de-accession , some sheets have blind stamp on corner or reverse side. Scans are defective, as machine malfunctioned on this subject, there is NO Green within any part of the studies. Clean off white folios are the norm This group covers : Ammonia Salt making