ERRATA. 
p. 71, 1. 3 from bot. for stone read stove.—p. 75, 1. 21 from bot. for their read these 
1. 17 from bot. for 11th Sg is h and insert a, before geometrical.—p. 84 1. 12 from 
= for 100 **down to 18” 100’? down to 18//—p. 85, in the table against mean 
in the sith s series, for 226 r ae 266. = 
ALTERATIONS FROM COPY. § «| 
p. 76, line 5 fr. top, omit the words axis of the.—p. 81, 1. 3 fr. bot. add—The first 
xperiments are projected in the order of their magnitudes, being with the 
six e 
greatest, though this was not precisely that of their occurrence, as will be seen by 
recurring to the commencement of the 8th series in Me: able. 
4 from top, after _quadrigeminut, re Ch num ; 
p. 136, 1. xago me page, 
— 25 — me 5 en = rome seven.—p. 137, 1. 26 fr. oe. for p eren s sileticon, read 
roides e, 1. 22 fF: a place Sarcinula auleticon,’ after T. affinis? in 
the last line before the ts on p. | 
