ERRATA AND CORRIGENDA TO PART I. 
e Ixv, line 16, jor into re((d in. 
Ixviii, line 3, jor fsomorphous read isomoiphous. 
Ixxx, line 4 from bottom, jor pyroxenes rexid pyroxene. 
line 16, jor rocs read rocks. 
16, line 9, ajter pp. read 240. 
26, line 1 of table, jor (Ca,Mg,Mn)SO read (Ca.Mg.MnjSiOg. 
28, last column of table. Ttli figure, jor 6- read 6-5. 
32, first column, for Dicknsonite read Dickensonite. 
33, first column, jor 4H2.O read 4H2O. 
55. last line but one, jor 79 read 70. 
70, second column of table, for 63 59 read 63-22. 
91, line 12, jor thousand read thousands. 
93, last line, jor thsee read these. 
96, line 9 from bottom, jor Lorsa read Lorca. 
100, table, column 2, jor 01 read 010. 
101, line 5, jor the second is read in. 
106, line 9, jor 98 read 100. 
122, line 12, for 11 read V ■ 
126, line 4, jor bisecrix read bisectrix. 
line 10, jor intertitial read interstitial. 
127, line 13, jor N9Mn(SiO)2 read NaMnCSiOg)^. 
129, line 2 from bottom, jor c read a. 
133, hne 12 from bottom, jor 2N?Fe'(Si03)2 read 2NaFe'"(Si03) 
last line, jor Mauselieus read Mauzelius. 
1.34, line 17. jor £ v c read Z ^ c. 
jor 2511 read 251'1. 
line 22, jor c c read z ^ c. 
159, line 24, jor finding not succeed in read not succeed 
finding. 
183, line 12, jor read ^. 
195. line 28, jor figures read figure. 
198, line 17, hehveen means and an insert of. 
199, line 2 from bottom, jor Dharwar read Dharwars. 
211, line 8 from bottom, jor cp read or. 
229, line 9, jor R read R". 
