Scientific American, Vol. 5, No. 13 (September 1861)
An issue of the weekly patent and mechanics' paper Scientific American, published by Munn & Co. in New York in September 1861 for inventors, machinists and manufacturers. Wood-engraved figures show sectioned machinery, a numbered gauge dial, a piano keyboard with note names, and a finely ruled hundred-dollar Treasury note with coupon stubs, plus ornamental prospectus lettering \u2014 useful for engraved numerals, hatched cutaways and banknote guilloche.
