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Updated: June 5, 2025
Among the most interesting researches of Spallanzani were his experiments to prove that digestion, as carried on in the stomach, is a chemical process. In this he demonstrated, as Rene Reaumur had attempted to demonstrate, that digestion could be carried on outside the walls of the stomach as an ordinary chemical reaction, using the gastric juice as the reagent for performing the experiment.
The summers are often extremely hot, but the air is refreshed by the gales from the mountains, which sometimes occasion very sudden changes in the atmosphere. The thermometer of Réaumur has been known to rise 26 degrees above freezing, but I have never myself observed it above 18 or 20 during my stay.
The second case is that detailed by a no less unexceptionable authority than Reaumur, in his "Art de faire eclore les Poulets." A Maltese couple, named Kelleia, whose hands and feet were constructed upon the ordinary human model, had born to them a son, Gratio, who possessed six perfectly movable fingers on each hand, and six toes, not quite so well formed, on each foot.
At five degrees North latitude, we took advantage of a calm to draw up water from a depth of five hundred fathoms, by means of a machine invented by the celebrated Russian academician Parrot. We found the temperature five degrees by Reaumur, while that of the water on the surface reached twenty-five degrees.
I have described elsewhere the hot springs of Kannea , in the vicinity of Trincomalie, the water in which flows at a temperature varying at different seasons from 85° to 115°. In the stream formed by these wells M. Reynaud found and forwarded to Cuvier two fishes which he took from the water at a time when his thermometer indicated a temperature of 37° Reaumur, equal to 115° of Fahrenheit.
The total number of chambers varying from thirty to forty, it follows that the Cigale lays from three to four hundred eggs. Réaumur arrived at the same figures from an examination of the ovaries. This is truly a fine family, capable by sheer force of numbers of surviving the most serious dangers.
On the day appointed I was introduced and presented by M. de Reaumur, and on the same day, August 22d, 1742, I had the honor to read to the academy the memoir I had prepared for that purpose.
Luckier than Fabre, however, Réaumur enjoyed not only the advantages of birth, but all the material conditions necessary to his ardent intellectual activity. Fortune overwhelmed her favourite with gifts, and played no small part in his glory by enabling him, from an early age, to profit by his leisure and to give a free rein to his ruling passions.
At some distance on the S.S.W., stands the bright crater, Mosting A, one of the most brilliant objects on the moon's visible surface. REAUMUR. A large pentagonal enclosure, about 30 miles in diameter, with a greatly broken border, exhibiting many wide gaps, situated on the E. side of the Sinus Medii, N.W. of Herschel.
After repeated experiments of this kind, apparently conducted with great care, Reaumur reached the conclusion that "the gastric juice has no more effect out of the living body in dissolving or digesting the food than water, mucilage, milk, or any other bland fluid."
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