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Updated: May 7, 2025


It is strong evidence of considerable efficiency in the instruments, and of careful attention on the part of the observer, that Lussac was able to record the temporary inversion of the law of change of temperature above-mentioned.

And, first, there is the suet the fat of the ox Russian tallow, I believe, employed in the manufacture of these dips, which Gay Lussac, or some one who entrusted him with his knowledge, converted into that beautiful substance, stearin, which you see lying beside it.

This voyage was regarded as such a pronounced success that three weeks later, in mid-September, Gay Lussac was induced to ascend again, this time alone, and under circumstances that should enable him to reach an exceptionally high altitude. Experience had taught the advisability of certain modifications in his equipment.

But ere the autumn of the same year two other scientific ascents, admirably schemed and financed at the public expense, had been successfully carried out at Paris in a war balloon which, as will be told, had at this time been returned from military operations in Egypt. In the first of these, Gay Lussac ascended in company with M. Biot, with very complete equipment.

As already observed, the surrounding plains were dotted with numberless craters mostly of small dimensions, except Gay Lussac on the north, whose crater was about 12 miles in diameter. Towards the southwest and the immediate east, the plain appeared to be very flat, no protuberance, no prominence of any kind lifting itself above the general dead level.

He at once made him acquainted with Gay Lussac, the famous Parisian chemist, and Liebig was thus placed on the road to the lofty position which he was afterwards to occupy in all the departments of science. The Munich zoologist von Siebold we first knew intimately years after.

From observations already recorded in this volume notably those of Gay Lussac, Welsh, and Glaisher it has been made to appear that, in ascending into the sky in daytime, the temperature usually falls according to a general law; but there are found regions where the fall of temperature becomes arrested, such regions being commonly, though by no means invariably, associated with visible cloud.

The Carpathians, forming in part the southern border of the Mare Imbrium, extend for a length of more than 180 miles eastward of E., long. 16 deg., and, embracing the ring-plain Gay- Lussac, terminate west of Mayer.

It will be nothing, but I have not the strength to write. I embrace you, and I count on seeing you soon. G. Sand CCXXVII. TO GUSTAVE FLAUBERT Paris, Monday, 3 June, 1872, Rue Gay Lussac, 5 I am in Paris, and for all this week, in the horror of personal business. But next week will you come? I should like to go to see you in Croisset, but I do not know if I can.

Alaric knew, what Clovis did not, that there was a ford at Lussac, and if he had any military foresight, he would plant a body of men across the road in the throat of the valley to intercept the Franks on their way. As it was, the Franks pushed on, and seeing a deer wade across the river at Lussac, raised exultant shouts, plunged into the Vienne, and crossed.

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