I took these slides in 1975, at the Harvard Peabody Museum, Cambridge MA. The museum features glass flowers and botanical models that were used for study before protography through microscopes became possible. Leopold Blashka (1822-1895) and his son Rudolph (1857-1939) meticulously crafted unbelievably realistic botanical glass models of 830 plant species, which are housed at Harvard's Botanical Museum. Part of this slide show is about minerals, also on exhibit at the natural history wing, and the final slide is a nice surprise.
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