Washington's first consulting chemist, Henri Erni.
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D000383:Agriculture / Q000191:economics / Q000193:education / Q000266:history; D001319:Authorship; D001680:Biographies as Topic; D002621:Chemistry / Q000193:education / Q000266:history; D004219:District of Columbia / Q000208:ethnology; D005285:Fermentation; D006077:Government Agencies / Q000266:history; D049672:History, 19th Century; D017056:Medical Laboratory Personnel / Q000193:education / Q000266:history / Q000523:psychology; D009181:Mycoses / Q000208:ethnology / Q000266:history; D011642:Publications / Q000266:history; D012108:Research Personnel / Q000193:education / Q000266:history / Q000523:psychology