PROFESSOR HEDDLE ON THE MINERALOGY OF SCOTLAND. 501 
ALTERATION PRODUCTS OF AUGITE. 
Conversion into Serpentine. 
S. G. | Si. ‘Alo. Feo. Fe. |Mn.| Ca. Mg. Kp. Naz.| Hp. Total. 








‘ahlite, 53°7 8 24:9 | 13-4 
Loss of Ca, and Si, | 
dation partial— ; 
ugite, Portsoy, . .. | 37°33 )1°13 | 4:36] 4:05 | 88] 1:2 | 36°71] ‘88 | °73 | 13°37 || 100714 
nstatite (?), Greenhill, 12°16 | 37°78 | 2°12) 5:07)2:1 |:76] ... | 37:01) tr. | tr. | 16:07 || 100-22) 
—Loss of Ca, and §i,— 
1 peroxidation— 
EDiallage, Portsoy, . . | 2°62 || 34°54 | 1°16 | 15-2 TOON EZONl Meio SOLOGH| meee ||| ea | aaon ul OOLOS 
nstatite (?), Be iherninie. ee ee eee eli 4 (nc OGr coe DW BYEEG || coo | cos || MBS Wee) 
, Yellow, Totaig, . ee ese |e 2a |e (On eee Oban 23) my s24n) AAS7h ence ORGAO OTe 
Black ,, , 5 sr BOA) | BD "29 | 2°96 | -45| 3°27 | 45°57 | °25 | -42 | 10°2 99°97 

,—with no peroxidation— , 
ler Spar, Black Dog Rock, . | 2°65 || 38°19 | 2°18 ‘07*| 8°48 | 51} 2:91 | 32:°42)1°4 | -07 | 14°03 || 100°49 



Serpentine, ; Lek . 4414]. Se oot ali ogull. youn eARSYAll Sonam neces |) 2ez che) 
IL. XXVIII. PART II. . 60 
