WEE 
Vill ERRATA, ALTERATIONS AND ADDITIONS. 
P. 88, 1. 4 fr. top, for powers read forms; 1. 13 fr. top, for Sours 
read Sauri; 1. 22 fr. top, after way add, If c?+d?=m?-+-n?, then 
2(c? +d?)=a?+8?=y?+0?, &c.; 1.7 fr. bot., for (a?+4-6) read 
(a?-+6*)?; 1. 6 fr. bot., for (a?+-6)? read (a?-+6)*; p. 89, bot. 
line, for 2« read 2a; p. 90, top line, for «.a$?y? read a+-a6?y? 
peli tol? 3. Lilt 
br f on hs “Dl ke 
read ——- 2 st a3 agt ott 234° 
p- 96, 1. 9, fr. bot. 
‘ , oy n—1- n-1 5 n—1 
100, 1. 8, fr. bot. fora ~ Ta "M5 , read a —— 2" #2 bey 
| 2 2 ~9 3 
1. 7. fr. bot. for a cae, , read Ba “34 eam 
—3 -—3 n—3 
L 6, is sana ae ore 
n— >. 
l. 5, fr. bot. for pth 
1. 2, fr. bot. for qi, read qi? 
p- 101, 1. 7, fr. bot. for nz"-'x, read nz"-' 2°. 
p- 145, 1. 7 fr. bot. for sempervirens, read glaucescens. 
i> read ee 
