Electronic Resource
[s.l.]
:
Nature Publishing Group
Nature
26 (1882), S. 105-105
ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] IN the interest of solar observers I send you a caution. A first-class sample of black glass was set with a bit of white paper behind it, and exposed for an instant to the focus of a 7-inch lens. The paper was charred where an eye would be placed. A longer exposure of a few seconds made the ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/026105c0
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