I'm a big fan of the old style of botanical illustration. Sadly, many of the older botanical illustrations were painted or printed on paper that has yellowed or discolored in some fashion, muddying the colors of the original illustration. With a lot of tinkering, I've come up with a method to remove the yellow color from scanned images while preserving the original colors. I started with images from Franz Eugen Köhler’s Medizinal-Pflanzen, downloaded from plantcurator.com. When I first started trying to restore the color in these images, I adjusted the hue, white balance, contrast, etc, b..
Ira Remsen grew up in New York and graduated from the Columbia University College of Physicians before going to Germany to study chemistry. During his years in Germany, he learned the value of observation and experimentation in teaching chemistry. When he returned to America to teach chemistry, he was appalled at the lack of laboratory instruction and the inadequacy of the available textbooks.Remsen wrote a new textbook, “Theoretical Chemistry,” and translated important German works to English,as well as publishing papers on the results of his own lab work. This attracted the atten..
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