Spec-trom′e-ter.
(Optics.) An instrument described by Valz in “Comptes Rendus,” Vol. LVII. pp. 69, 141, for viewing the spectrum by direct vision, and so arranged as to reduce the dispersion of the rays as little as possible.
Hide browse bar Your current position in the text is marked in blue. Click anywhere in the line to jump to another position:
This work is licensed under a
Creative Commons Attribution-ShareAlike 3.0 United States License.
An XML version of this text is available for download, with the additional restriction that you offer Perseus any modifications you make. Perseus provides credit for all accepted changes, storing new additions in a versioning system.
View a map of the most frequently mentioned places in this document.
Download Pleiades ancient places geospacial dataset for this text.