A chart is presented which saves computational time in analyzing diffraction photographs of crystals. The new chart, used with a standard Bernal chart, facilitates the plotting of reciprocal lattice points from spots which are observed on a single crystal x‐ray pattern made with monochromatic radiation.

Topics
Crystal lattices
1.
P. P.
Ewald
,
Z. Krist.
A56
,
148
–
150
(
1921
);
Google Scholar
 
Henry, Lipson, and Wooster, The Interpretation of X‐Ray Diffraction Photographs (Macmillan and Company, Ltd., London, 1951), Chap. 3.
2.
J. D.
Bernal
,
Proc. Roy. Soc. (London)
A113
,
117
(
1927
).
Google Scholar
 
3.
A 20‐cm diameter chart on transparent film will be furnished by the author upon request.
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© 1956 American Institute of Physics.
1956
American Institute of Physics
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