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| | Science Timeline |
 | | In 1929, Adolf Friedrich Johann Butenandt and, independently, Edward Adelbert Doisy isolated 'estrone,' a sex hormone, from urine. |
 | | In 1929, Jung, in a commentary on Das Geheimnis der goldenen Blüte, translated as The Secret of the Golden Flower, began an exploration of the significance of alchemical symbolism in depth psychology for the resolution of conflicts of opposites. |
 | | In 1932, George Kingsley Zipf published the scaling relationships which are now known as Zipf's law, namely, that ordered quantities are apt to be inversely proportional to their rank, that is, proportional to 1, |
| www.sciencetimeline.net /1926.htm (5301 words) |
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