Excelsior lantern. By Queen, Philadelphia
Image source (VL Image)
Source
Anonymous.
1892.
Harvard Psychological Laboratory in Dane Hall: Instruments for Experiments on Sight.
Photography
Related VL Sites
Psychological Laboratory, Harvard University.
Cambridge (MA).
comment
The "Excelsior" is also shown on <link ref="tec3009">another photograph</link> from this set. See a color photograph of a similar device in the <link href='http://dssmhi1.fas.harvard.edu/emuseumdev/code/emuseum.asp?rawsearch=Number%2F%2C%2Fis%2F%2C%2FWJ0119%2F%2C%2F0%2F%2C%2F0'>Harvard Collection of Historical Scientific Instruments</link>. For a figure in a trade catalog see <link href="http://www.sil.si.edu/digitalcollections/trade-literature/scientific-instruments/files/52505/imagepages/image34.htm">Queen, 1883, p. 32</link>. For another color photograph see Thomas Greenslade's collection of <link href="http://physics.kenyon.edu/EarlyApparatus/Optics/Projector/Projector.html">Instruments for Natural Philosophy</link>.VL Technology
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