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- Our printing-house often wanted sorts, and there was no letter-founder in America; I had seen types cast at James's in London, but without much attention to the manner; however, I now contrived a mould, made use of the letters we had as puncheons, struck the matrices in lead, And thus supply'd in a pretty tolerable way all deficiencies.
There are no more uses of "matrix" in The Autobiography of Benjamin Franklin.
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