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heliotype, 1
 

image

Fig. 61. See no. 68. Diamine Red 3 B.
Fig. 62. See No. 96. Red Violet 5 R S.
Fig. 63. See No. 104. Fast Acid Violet B.
Fig. 64. See No. 91. Ethyl Violet.

Heliotype Co., Boston.

Horace Scudder Uhler and Robert Williams Wood. Atlas of absorption spectra. Carnegie Institute, 1907
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27 November 2012
tags: calibrations; enough; heliotype; spectra; sensorium, the