ERRATA. 
-p. 71,1. 3 from bot. for ston oni ew staves —p. 75,1 121 1 fretechet. t. for their read th 
1. 17 from bot. for Sagi ee rey and insert a, before geometrical.— - 841.1 
bot. for 100 ““down to 18” read 100/! down to 18/'—p. 85, in the table 
in the 5th series, for 226 read ead 266. 
these 
_from 
dazuirst mean 
ALTERATIONS FROM Copy. 
p- 76, line 5 fr. top, omit the words axis of the. —p. 81, 1. 3 fr. bot. add—The first 
six experiments are projected in the o ler of their magnitudes, beginning with the 
greatest, though this was not precisely that of their occurrence, as will be seen by 
ce to the commencement of the 8th series in th table. 
136, 1. 24 from top, after C. pet arg y> m, read C. h ame page, 
1, 3 from ti, "e six read seven.—p. 137, 1. 26 fr. top, for Catenipora a ‘aleteak: read 
; aroides; same page, 1. 22 fr. top, ones Sarcinula auleticon, after T. affinis? in 
~ the last line before the note on p- 1 
———— 
Volume xx.—p. 85, 1. 13 fr. top, for Tschaudy read Tschoudy ; same 1.14 
fr. top, for Thurgas read Thuya: sii 
