. Annals of Philosophy. Article IX. On the Crystalline Forms of Artificial Salts. By H. J. Brooke, Esq. FRS. (Continuedfrom p. 22.) Sulphate of Nickel and Copper. The primary form of this salt is an oblique rhombic prism, with an imperfect cleavage parallel to its lateral planes. PonM,orM' 100° 15' Pone' 117 30 M on M' 83 30 I received these crystals from Mr. R. Phillips, and having dissolved some of them in distilled water for the purpose of obtaining others with more perfect planes, I found that the first crystals deposited from the solution were sulphate of' cop- per ; the next, sulphate of
. Annals of Philosophy. Article IX. On the Crystalline Forms of Artificial Salts. By H. J. Brooke, Esq. FRS. (Continuedfrom p. 22.) Sulphate of Nickel and Copper. The primary form of this salt is an oblique rhombic prism, with an imperfect cleavage parallel to its lateral planes. PonM,orM' 100° 15' Pone' 117 30 M on M' 83 30 I received these crystals from Mr. R. Phillips, and having dissolved some of them in distilled water for the purpose of obtaining others with more perfect planes, I found that the first crystals deposited from the solution were sulphate of' cop- per ; the next, sulphate of nickel and copper similar to those which had been dissolved: these were removed, and were succeeded by a crop of the same crystals intermingled with a few others of the rhombic sulphate of nickel; and crystals of both these salts con- tinued to be deposited together until the fluid was nearly all eva- porated. There were not any crystals of sulphate of copper deposited from this solution after the double salt began to crystallize, but the solution at Mr. P.'s, from which the crystals I received had been obtained, had subsequently produced crystals of sulphate of copper. It would appear from these circumstances that the double salt would only be produced in uncombined portions of both of the single ones. Sulphate of Ammonia and Magnesia. The primary form of this salt is an oblique rhombic prism. P on M, or M' 104° 45' Pone, ore' 154 40 Pong 135 40 Pone' 115 30 MonM' 109 30 M on k 125 15 The crystals of this and the following I have received from Mr, R. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original London
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