Carl Schleicher & Schuell Sample Book of Special Filter Papers

New York (US Office): Carl Schleicher & Schuell Company, 1930. Softcover. First edition, n. d. (ca 1930); 4 x 5 1/2; pp. [1], 4-46; pink, card stock, wallet-type portfolio; two pockets to verso of wraps with 11 samples; front wraps stamped, with a manuscript name and address; illustrated with engravings and tables; a few spots to wraps; light, general wear; very good condition.Carl Schleicher & Schuell Company was established in the second half of the 19th century in Dueren, Germany, and several satellite offices were opened in Rhineland, New York City, Feldbach, Switzerland, Hertogenbosch, Netherlands, and others. The company specialized in laboratory and industrial filter paper, filter units for chemical analysis, graph and drawing paper, etc.