Ill 



TAB. CLVIII. 



PLUMBUM phosphatum, 

 Phosphate of Lead. 



Class 3. Metals. Order 1. Homogeneous. 

 Gen. 14. Plumbum. Spec. 2. Phosphatum. 



Div. 1. Crystallized. 



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 modifi- 

 cations of the crystals, one bevilled on the horizontal edges 

 of the column (see the right hand figure) 3 the other 

 rounded on the same edges, approaching such as form 

 spiculae, and is as it were formed of spiculae, side by side, by 

 which we see an example of crystals forming of spiculae or 

 lengthening in their modifications by spiculae; 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. 



