. Annals of Philosophy. 288 On the Crystalline Forms of Artificial Salts. [April, parallel to P is very easy, and the planes bright; that parallel to M and M' is less determined, although sufficiently apparent. P on M, or M' 90° 0' Pone, ore' 137 48 MonM' 90 0 M on c 132 12 / C \ r'\ /???? > M ! M ^ \^ \ 1 / N^ p- Acetate of Slronfia. The crystals I have obtained of this salt from a solution of the carbonate in acetic acid are very small, with rather imperfect planes, and have not afforded distinct cleavages parallel to any of these. There is, however, an appearance of cleavage parallel to


. Annals of Philosophy. 288 On the Crystalline Forms of Artificial Salts. [April, parallel to P is very easy, and the planes bright; that parallel to M and M' is less determined, although sufficiently apparent. P on M, or M' 90° 0' Pone, ore' 137 48 MonM' 90 0 M on c 132 12 / C \ r'\ /???? > M ! M ^ \^ \ 1 / N^ p- Acetate of Slronfia. The crystals I have obtained of this salt from a solution of the carbonate in acetic acid are very small, with rather imperfect planes, and have not afforded distinct cleavages parallel to any of these. There is, however, an appearance of cleavage parallel to the plane M of the annexed figure. From the general character of the crystals and from measurement, a right oblique- angled prism may be regarded as their pri- mary form. The crystals are very efflores- cent. M on T 96° / M on d, Mon/ 107 129 M on e 153 T on e 122 d on d' 124 10' 33 20 12 58 54 >t Nitrate of Strontia.—Anhydrous. The primary form is a regular octahedron. The crystals gene- rally resembling those of nitrate of lead, given in the number of the Annals for January last. Hydrous. A very efflorescent salt, and not affording any distinct cleav- age that I have been enabled to discover. We may assume an oblique rhombic prism as its primary form. The crystals are sometimes considerably lengthened, and present only those planes which are marked as the primary. P on M, or M' P on i, or i' 103° 111 131 66 146 150 126 40' 5 47 MonM' M on k 20 50 M on i 10 0. 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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