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Mallet, Robert. "On the Objects, Construction, and Use of Certain New Instruments for Self-Registration of the Passage of Earthquake Shocks." From: The Transactions of the Royal Irish Academy, Vol. 21, (1846) pp. 107-113, with a large folding plate of the apparatus. Good copy. $150/SOLD
This is the first publication of Mallet's effort to develop an instrument to register the activities of earthquakes--the first of its kind.
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