History
A scholarly account of the early history of Prince Rupert’s Drops is given in the Notes and Records of the Royal Society of London. Most of the early scientific study of the drops was performed at the Royal Society.
The drops are reliably reported to have been made in Mecklenburg (North Germany) at least as early as 1625. However, it has been claimed that they were invented in Holland, hence a common name for them in the seventeenth century was larmes bataviques or lacrymae Batavicae. The secret of how to make them remained in the Mecklenburg area for some time, although the drops were spread across Europe from there, for sale as toys or entertainments.
It seems clear that Prince Rupert did not discover the drops, but played a role in their history by being the first to bring them to Britain, in 1660. He gave them to King Charles II, who in turn delivered them in 1661 to the Royal Society (which the King had created the previous year) for scientific study. Several early publications from the Royal Society give accounts of the drops and describe experiments performed. Among these publications was Micrographia of 1665 by Robert Hooke, who later would discover Hooke’s Law. His publication laid out correctly most of what can be said about Prince Rupert’s Drops without a fuller understanding than existed at the time, of elasticity (to which Hooke himself later contributed so greatly) and of the failure of brittle materials from the propagation of cracks. A fuller understanding of crack propagation had to wait until the work of A. A. Griffith in 1920.
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