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What is hidden in 3D image?
Brain Teasers
[1883] What is hidden in 3D image? - Stereogram - 3D Image - #brainteasers #stereogram #3Dimage
2016-01-31
American Leather Chemists AssociationIn 1903, the American Leather Chemists Association was formed by nine founding members. It was the outcome of a decade when a small number of chemists with a commercial interest in the product had worked to establish reliable analytical methods for analyzing the tanning extracts used in the industry, and to introduce scientific methods of tannery plant control. They devised a method of measuring the amount of tanning material absorbed by dried, ground hide. However, these formative years were still characterised by bitter disputes and wrangling among the chemists.« |