CERTIFYING RAZOR STRAPS MADE BY DANIEL FISHER as "well-adapted to sharpen edged tools" and "highly serviceable in restoring the keen edge of my razor & cutting instruments," in two manuscript documents, one signed by Macneven, the other by Mitchell

Two manuscript documents. 4to, each one page, approximately 250 words total, docketed on blank verso. Mitchell writes, in part, "I hereby certify that I have heard Major Fisher's explanation of the materials he employs in preparing his warranted Razor Straps . I have found the apparatus admirably adapted for shaving" and Mitchell adds, in part [following a description in another hand of "Fisher's New Improved Razor Straps Warranted"], "[Fisher] has communicated to me the Composition of his Chemical paste." Macneven and Mitchell qualify as among the most important American scientists of the day; Macneven opened the first chemical laboratory in New York (1815) and Mitchell published works on chemistry and mineralogy, helped found scientific societies, and served as a U.S. Senator from New York. The two scientists joined with others to open the Rutgers Medical College in 1826. Both documents folded, but very good.