A demonstrative and convincing proof that an acid does consist of pointed parts is, that not only all acid salts do Crystallize into edges, but all Dissolution of different things, caused by acid liquors, do assume this figure in their Crystallization; these Crystals consist of points differing both in length and bigness from one another, and this diversity must be attributed to the keener or blunter edges of the different sorts of acids.

Cours de Chymie