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Excerpt from Essays of Jean Rey, Doctor of Medicine: On an Enquiry Into the Cause Wherefore Tin and Lead Increase in Weight on Calcination
Some eminent personages having observed with aston~ ishment that tin and lead increase in weight when they are calcined, have been seized with a praiseworthy desire to enquire into the cause of this phenomenon. It has proved a goodly subject, but the enquiry has been trouble some, and its fruits very small: in so far that after having directed their thoughts to all quarters, they have only been able to adduce reasons so feeble that no man of sound judgment dares trust them for support, or by their aid shelter his mind from all doubt. The sieur Brun, Master Apothecary in Bergerac, having lately paid atten tion to this augmentation, and believing, as I apprehend, that no one before him had been aware of it, has invited me in one of his letters to enter on this line of thought and furnish him with the cause. Now, since he is a person whose integrity of life, rare experience in his art, and other patent virtues, oblige every honest man to wish him well, I confess that these qualities have had such6 Re].
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