โ Scribed by C.
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Bursting Power of Ice.--Ed. Hagenbaeh experimented, during the past severe winter, upon the bursting force exerted in the expansion of water when freezing. Two interesting experiments were made with east-iron hand grenades. The outer diameter was 15 centimetres (5"9 in.), the inner diameter 12"8 cm. (5"04 in.) The shells were filled with water, closed with a screwed iron plug, and exposed to the cold. Both shells were broken, and a curved thread of ice was projected, by means of an ice column, from the upper surface. One of the plugs was evidently thrown out with great violence, and to such a distance that it could not be found. The curvature in that ease was bent upward.--Wiedemann's Annalen.
C.
๐ SIMILAR VOLUMES
Stoecklin and Vetillart, in their works for enlarging the harbor of Calais, found great difficulty in sinking the piles and plankings through the fine, moist beach-sand. The use of water to facilitate the penetration of broken iron piles, suggested its use on the outside and in advance of the wooden
CJ~h'dde?' cO?&'?ZStZ~~O~Z zk S~effWZ E?tghZCS. 373 further, they will find they have lost most of the value of their crops in the cost of transportation. This is why good flax is burnt in the West, and corn is used there for fuel. With these facts and circumstances before them, it might be well for