Crossword-Solution: ROCKSALT 8 letters, 12 clues 🏆 scrabble score: 14

The German subdivisions of the Bunter are as follows:--(1) _Upper Buntsandstein_, or _Röt_, mottled red and green marls and clays with occasional beds of shale, sandstone, gypsum, rocksalt and dolomite.

Rocksalt cleaves in three directions, and the resulting solid is this perfect cube, which may be broken up into any number of smaller cubes.

That differences, for example, exist between the inner structure of rocksalt and that of crystallised sugar or sugar-candy, is thus strikingly revealed.

Rocksalt is remarkably transparent to thermal radiation of nearly all kinds, but it is extremely opaque to radiation from a heated plate of rocksalt, because it emits when heated precisely those rays which it absorbs.

Magnus, on the other hand, employing a thermopile and a source of heat, both of which were enclosed in the same exhausted receiver, in order to avoid interposing any rocksalt or other plates between the source and the pile, found an absorption of 11% on admitting dry air, but could not detect any difference whether the air were dry or moist.