Framed Prints
Framed Print of National Standard of Mass, Kilogram
After the Treaty of the Meter was signed in 1875, the International Bureau of Weights and Measures (BIPM) in Sevres, France, procured 43 prototype kilograms of platinum-iridium in the form of right circular cylinders of equal diameter and height (approximately 39mm) with slightly rounded edges. One of the set, having essentially the same mass as the Kilogramme des Archives, was selected as the International Prototype Kilogram, and is now maintained at BIPM. National Prototype Kilograms No. 20 and No. 4 were received by the US from BIPM in 1890. On January 2, 1890, President Benjamin Harrison broke the seals on the case and gave the standard to Thomas Mendenhall, Superintendent of Weights and Measures. Its mass relative to the International Prototype Kilogram was reported as 0.999 999 961 kilograms. Since it was the first of the two prototype kilograms to be received, K20 is sometimes called the national standard of mass. Of the seven base units in Le Systeme International, the kilogram is the only one currently defined by an artifact. After the Mendenhall Order in 1893, Kilogram No. 20 became the primary national standard for all mass measurements. © NIST / Science Source
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Media ID 47343100
1875 20th Cylinder Cylindrical Mass Masses Measure Measurement Measurements Measures Metric Metrology National Nist Standard Standards System Systems Treaty Twenties Twentieth Twenty Weight Weights
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
Your artwork will be printed as shown in the preview. To adjust please select Edit Printed Image under the Buy button
Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 24.4cm x 15.6cm (9.6" x 6.1")
Estimated Product Size is 36cm x 31cm (14.2" x 12.2")
