1. Rey, Jean (1630) Essays de Jean Rey, docteur en médecine. Sur la recherche de la cause pour laquelle l’estain et le plomb augmentent de poids quand on les calcine. Guillaume Millanges, imprimeur ordinaire du roy, Paris. Excerpt from pages 96–97 reproduced with permission of Bibliothèque nationale de France. Copyright © 1630 by Bibliothèque nationale de France.
2. Hooke, Robert (1665) Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses. With observations and inquiries thereupon. Observation xvi. Of charcoal, or burnt vegetables. Printed by Jo. Martyn and Ja. Allestry, printers to the Royal Society, London. Excerpt from page103 reproduced with permission of Bibliothèque nationale de France. Copyright © 1665 by Bibliothèque nationale de France.
3. Boyle, Robert (1673) New experiments to make the parts of fire and flame stable and ponderable, included in The philosophical works of the honourable Robert Boyle. By Peter Shaw, M.D. Vol. II, Fire and flame weighed in a balance. Printed by W.G. for M. Pitt, 1725, London.
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