الحرارة لا وزن لها .. كتاب في سبيل موسوعة علمية .. الدكتور أحمد ذكي

Heat has no weight

Another thought occurred to Count Rumford.
The heat had no weight. If it is true that bodies have heat and are liquid, then they must have weight.

He made a very accurate scale, and he weighed cold things and hot things, so there was no difference.
Thus, he demolished the idea that might come to a naive, natural man: that hot bodies are heavier than cold ones.

(A caricature of Count Rumford drawn in 1800, in which the Count warms himself with a fireplace of his own invention, and on the mantelpiece are two cooking pots of his design)

When the matter of heat was established, its essence, degree, and magnitude, the word coined by Lavoisier gave a name to heat, which is Calorie (which is a Latin word meaning heat). They gave it a name to the unit of heat, which is the amount that raises the temperature of a cubic centimeter of water by one degree Celsius.

We Arabs followed suit and called this unit a price.
The price in the language is free.

Lavoisier on the guillotine of the French Revolution:

I do not think that anyone has not heard about the fate that awaited Lavoisier, and he gave modern science whatever he gave, until when his fame spread, his glory became great, and the hopes for more knowledge from him increased, fate brought the end of this life, and it was the most hideous end.

They are the men of the French Revolution. They carried a burden on a man, and they ended with him in the same way that men and women who were burdened by them must end. He died on the guillotine, no knowledge benefited him, and no male intelligence could intercede for him.

- blessed marriage ;

Count Rumford approached Lavoisier's widow, asking for her hand. She married him, yet she continued to remember her first husband, Lavoisier, as long as she could, and she was happy.