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What is the earliest mention of use of spyglass by seafarers? What is the earliest mention of use of spyglass by seafarers? How fast it became a commonly used nautical instrument? UPDATE: The most interesting thing I've found so far is in E Sluiter, The first known telescopes carried to America, Asia and the Arctic, 1614-39 Journal for the History of Astronomy, 28:2 (1997) p 141
What is the earliest evidence for the use of hearing aids? D N Brooks, in Hearing aids – a historical survey states that Emperor Hadrian reportedly used to cup his hand behind his ear, the better to hear the affairs of state Historically, the cupped
How was the dynamics of a naval battle in the 17th century? I'm curious about the "mechanical" aspects in the course of a naval battle in the 17th century To explain better, here are some questions whose answers would provide a text-answer explaining the c
What types of work did enslaved people do in the Americas? Obviously, they were used in agriculture, but I'm interested in an overview of something like the proportion of work that was done by enslaved people in different industries, especially with refere
contemporary history - Why was Apple not able to compete with Microsoft . . . He acquired a CP M-knock off OS, 86-DOS, for an absurdly low sum, and then used the product he had essentially obtained for free to undercut Digital Research's CP M Windows Internet Explorer was originally licensed to Microsoft by Spyglass for a royalty on every copy sold