Electronic Resource
[s.l.]
:
Nature Publishing Group
Nature
69 (1904), S. 489-489
ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] I ENCLOSE two prints I have taken with a radium screen. No. 1 shows the impression of a steel pen-nib, a steel screw, and an ordinary paper fastener. These articles were laid on a photographic plate and exposed for 6 days. No. 2 shows the impression of two bronze coins (halfpennies) similarly ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/069489f0
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