Phosphate of Lead

We have already figured Phosphate of Lead, tab. 84. of the present work. These beautiful little specimens show the yellow and orange varieties, and two different modifications of the crystals, one bevilled on the horizontal edges of the column (see the right hand figure), the other rounded on the same edges, approaching such as form spiculæ, and is as it were formed of spiculæ, side by side, by which we see an example of crystals forming of spiculæ or lengthening in their modifications by spiculæ; which often happens, according to circumstances, as other substances do in plates, as has been most commonly observed. These specimens came from Wanlockhead by favour of G. Laing, Esq.