Field Tested Systems

RSpec now offers a unique poster of the Periodic Table of the Elements. The Periodic Table of Spectra poster ($6.95) measures 36 by 24 inches and displays the emission spectra of every known element seen in the universe. Its information is based on the NIST Atomic Spectra Database and also includes the names and positions of unstable elements. A laminated version is available for $29.95 plus shipping.

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