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And indeed, when I saw them, I could not but much commend the child for his fancy; for the first things that appeared were a silver punch or wine can and a ladle, then a gold watch, a pair of scissors, a small silver chafing-dish and lamp, a large case of mathematical instruments, a flageolet, a terrella or globular loadstone, a small globe, a dozen of large silver spoons, and a small case of knives and forks and spoons; in short, there was, I believe, the greatest part of the Portuguese captain's valuable effects.
In the Galileo Museum in Florence there is a terrella twenty-seven inches in diameter, of loadstone from Elba, constructed for Cosmo de' Medici. which I had hoped he had sent me, but to my trouble I find it is to present from him to my Lord Sandwich, but I will make a little use of it first, and then give it him. 3rd.
In the Galileo Museum in Florence there is a terrella twenty-seven inches in diameter, of loadstone from Elba, constructed for Cosmo de' Medici. which I had hoped he had sent me, but to my trouble I find it is to present from him to my Lord Sandwich, but I will make a little use of it first, and then give it him. 3rd.
Then move the middle or centre of the wire to another spot, and so to a third and fourth, always marking the stone along the length of the wire where it stands still; the lines so marked will exhibit meridian circles, or circles like meridians, on the stone or terrella; and manifestly they will all come together at the poles of the stone.
Gilbert set great store by his invention of the terrella, since it led him to propound the true theory of the mariners' compass. In his portrait of himself which he had painted for the University of Oxford he was represented as holding in his hand a globe inscribed terella.
Gilbert set great store by his invention of the terrella, since it led him to propound the true theory of the mariners' compass. In his portrait of himself which he had painted for the University of Oxford he was represented as holding in his hand a globe inscribed terella.
He did this by placing the stone in a metal lathe and converting it into a sphere, and upon this sphere demonstrated how the poles can be found. To this round loadstone he gave the name of terrella that is, little earth.
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