1920 Rotogravure Science News Cryoscope Device Typewriter Sign NY David SI1

This is an original 1920 two-page sepia rotogravure set (two single-sided pages) with images of science news featuring the Cryoscope, a device that enables one to tell just what amount of water has been added to a sample of milk; a paddle boat; the day and night view of a huge electric typewriter sign in New York City; the Non-Sinkable Safe invented by Mannotti Nanni of Chicago; David Swart and James Smith of Evanston with their water bicycle, a punching Harding or cox on the voting machine; Ornithopter or Flapping Wings invented by Mr. H. S. Dixon; the Corpus Christi College's sun dial; the original automobile that first appeared on the streets of Chicago in 1892; the lace tree, an stove invented by a British Navy Officer; and the Nightie Bunnie, children's toys. Photographs by Gilliams Service, O. J. Gude Company, and Underwood and Underwood.

Please see both images.

CONDITION

This 91+ year old Item is rated Near Mint / Very Fine+. No creases. No natural defects. No surface rub. No tears. No water damage. Please note that there is printing on the reverse.

• Product Type: Original Rotogravure; Sepia
• Grade: Near Mint / Very Fine+
• Dimensions: Approximately 7.5 x 10.75 inches; 19 x 27 cm
• Authentication: Serial-Numbered Certificate of Authenticity w/ Full Provenance
• Protection: Packaged in a custom archival sleeve with an acid-free black board (great for display, gift-giving, and preservation)

SI1A10C20