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The French Encyclopædia relates that M. Hassenfratz saw ice served up at table at Chambéry which broke into hexagonal prisms; and when he was shown the ice-houses where it was stored, he found considerable blocks of ice containing hexahedral prisms terminated by corresponding pyramids. In vol. xv.
In this case of blocks of alpine stones upon the Jura, the question is concerning the transportation of those stones; but, in other cases, the question may be how those blocks were formed. That many such blocks of stone are formed by the decay of the rock around them, is clearly proved by the observations of M. Hassenfratz, published in the Annales de Chimie, October 1791.
It may be, he adds, that this structure is in the first place determined by the act of freezing, but it does not develop itself until the ice thaws. M. Hassenfratz observed an appearance in ice on the Danube at Vienna corresponding to that described at Jena.
When a professor has lost consideration, without which it is impossible for him to do well, they allow themselves to insult him to an incredible extent. Of this I will cite a single specimen. A pupil, M. Leboullenger, met one evening in company this same M. Hassenfratz, and had a discussion with him. When he reëntered the school in the morning, he mentioned this circumstance to us.
But though M. Hassenfratz has thus given us a most satisfactory view of the natural history of those blocks of stone which are now upon or near their native place, this will not explain other appearances of the same kind, where such blocks are found at great distances from their native places, in situations where the means of their transportation is not to be immediately perceived, such as those resting upon the Jura and Saleve, and where blocks of different kinds of stone are collected together.
Beside himself, and seeing his prey escape him, by means of this unexpected answer, M. Hassenfratz addressed himself to the inspector charged with the observance of order that day, and said to him, "Sir, there is M. Leboullenger, who pretends never to have seen the moon." "What would you wish me to do?" stoically replied M. Le Brun.
This entitles you to attend several courses of lectures by some of the most eminent professors, such as FOURCROY, CUVIER, LA HARPE, DEGERANDO, SUE, HASSENFRATZ, LEGRAND, &c.
I know of no such incident in Cæsar's life, though M. Hassenfratz quotes Cæsar's own words: the town of Vesoul, too, had no historical existence before the 9th or 10th century of our era. The grand and lovely scenery of the Val de Travers has at length been opened up for the ordinary tourist world, by the railway which connects Pontarlier with Neufchâtel.
"Be on your guard," said one of our comrades to him; "you will be interrogated this evening. Play with caution, for the professor has certainly prepared some great difficulties so as to cause laughter at your expense." Our anticipations were not mistaken. Scarcely had the pupils arrived in the amphitheatre, when M. Hassenfratz called to M. Leboullenger, who came to the board.
The pupils, for instance, having observed the insufficiency of M. Hassenfratz, made a demonstration of the dimensions of the rainbow, full of errors of calculation, but in which the one compensated the other so that the final result was true.
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