714 Notice of the Deo Monnees. [July, 



disks appear at first sight like sections of the jasperized stems of 

 gramineous plants, or small pithy wood, and at the edges some of them 

 (the yellow more than the red) appear marked with strioe exactly like 

 part of a small petrified twig. When polished however no traces of 

 vessels can be discerned on the transverse section of either the green or 

 red ones by a magnifier. 



Selecting one which was a fair medium between the yellow and the 

 red, I submitted it to the following tests. Premising however that its 

 entire weight was not more than 1-2- grain. 



Examination. 



It is excessively brittle, the fracture may be called splintery — con- 

 choidal, as well as one can distinguish in such minute specimens, and 

 i<*is the most splintery substance I am acquainted with, the slightest 

 touches of the pestle making it fly as if from an explosion, so that it must 

 be powdered in a covered or a steel mortar. The fractured surface is 

 that of a red enamel or bright sealing wax. The powder resembles 

 brick-dust. The hardness is 5-6, or between Apatite and Adularia. 

 It scratches Fluor readily, and does not yield to the knife. 



It does not adhere to the tongue or show any effervescence with 

 acids. Its smell, if any thing with such small specimens, is metallic 

 when breathed upon. It is not magnetic. 



Before the blowpipe in the forceps and on charcoal it fuses immedi- 

 ately to a dark steel- coloured brilliant globule, which below is marbled 

 with broad greyish and dirty white veins. This globule is not magne- 

 tic and internally has the red fracture of the fresh Deo Monnee. 



With borax on Platina wire it fuses entirely to a bright emerald 

 green glass while hot, which becomes of a pale blue on cooling. 



With the addition of metallic tin this bead gives a brownish red 

 enamel. The colouring matter of the Deo Monnee therefore is princi- 

 pally protoxide, and perhaps the suboxide of copper, and, as will be 

 subsequently seen some iron. 



Via Humidd. 



The powder is not soluble in Muriatic, Sulphuric or Nitric acids. 

 The Sulphuric acid gives it a dull brick or brown-red colour which 

 becomes brighter after several clays, the other two acids brighten the 

 powder almost to an orange, though quite colourless. 



