The Metric System.
New York: American Metrological Society, 1892. First Edition (presumed). Original Wraps. A rather uncommon late 19th century primer on the metric system...scarce in orginal wraps. Very Good in Wraps. Item #6269 Minor shelf/edge wear, small split at head, light even toning to wraps, two small moisture spots, else tight, bright and unmarred. Tan printed wraps, black ink lettering. 8vo. 21pp.