ORIGINAL, NOT A COPY NOR A REPRINT; THE SCIENTIFIC AMERICAN, APRIL 10th, 1880. FRONT COVER "THE MANUFACTURE OF PRINTING INKS-GEORGE MATHERS' SONS' INK WORKS, JERSEY CITY, N.J." 1+ PAGES ON "THE SAWYER ELECTRIC LIGHT" W/3 ILL'S INCLUDING "FILLING THE SAWYER LAMPS WITH NITROGEN" AND MORE. 11" X 16"; COMPLETE 16 PAGE ISSUE; VERY GOOD CONDITION--SEE PHOTOS. CHECK OUT OUR OTHER ADS, HISTORIC AND SPORT ITEMS.