ERRATA. 



Vol. VII. 



Page 394, line 6 from bottom, dele half. 



- 398, 4, for 2,000,000 read 5200 XlO 6 ; and for 8,200,000 read 



21000 XlO 6 . 



398, 10, for 10 tons read 53600 X 10 6 tons ; and for 42 tons read 



874000 XlO 6 tons. 



Vol. VIII. 



51, 8, for property read quality. 



53, 8, for a given result read given a result. 



54, 12, for that read steel. 



- 125, 11, for sinQ read cos 9. 



- 128, 3 from bottom,/or $%() read 2 () 



128, 2 for i//i (0)+ 1// 2 (0) read 1^(0) -i// 2 (0). 



157, 10, for no read or without. 



157, 11 from bottom, dele Hence. 



157, 8 and 7 from bottom, for at the rate of one turn in 8 ^ -5 



wave lengths read at a certain rate. 



- 181, 13, for the part read the narrow part. 



- 181, 16, for a read - 



182, 2, for 268 read 238. 



- 182, 3, for 19 read 49. 

 _ 309, 5, for 9' read 0'. 



- 309, 5, for (tan|) read (*^^ 



- 309, 7,/or e'-t read 0'-i. 



309, 13,/or (sin 6)_ 2t ._j read (sine)- 2 '" 1 . 



- 310, - 3, for (tnn|) read (tan|)'. 



488, 12 from bottom, for June 15 read June 18. 



- 488, 3 far M.D. read Esq. 



- 573, II, for P(l, 2, 3, 4, 5, 6,) 9 read P(l, 2, 3, 4, 5, 6)?. 



