ERRATA. 

 Page 216, line 4, for 200 lbs. read 2 volts. 



_250>- _250r 



Page 287, line 27, for i'o 6 1 read v=v e t . 

 Page 288, line 29, for Q = C.|e ' J R 



Page 324, line 13 from bottom, for arterial read cardiac. 

 Page 372, line 7, dele comma after the tvord ether. 



Pago 374, lines 18 and 19, for " forms a sort of lather, on agitation from which" 

 read "forms on agitation a sort of lather, from which" 



Page 375, line 22, for " alkaloids ; and their derivatives thus " 

 read " alkaloids and their derivatives ; thus " 



)> 5> 35, for " bromohydrobromate of tetracodeia." 



read " hydrobromate of bromotetracodeia." 



Page 498, line 2 from bottom, after "action." insert: — "The mathematical expres- 



log 3 



sion of this law is c = C^ lo S 2 , c being the chemical action, C the constant, and p the 

 proportionate quantity of salt." 



Page vii, line 14 from bottom, for Cuchullius read Cuchullins. 



Correction to W. H. L. Russell's Paper on Linear Differential Equations. — No. IV. 

 The expression for Q, page 283, should be 



Q= . . • J±. + A?=i + . . . A 2 ^~ 2 +A^- 1 +A .A 



^ ccn-fj.^ x ?i- f j.-l 2 11 10 



The process for ascertaining the value of the integral 

 czz(z — «)A.-i 

 J a (* — /j)f*+"(« — yj^+l 



is erroneous, but how the mistake occurred I cannot now tell. — W. II. L. R. 



DIRECTIONS TO THE BINDER. 



Vhie T. between p. G & 7. 

 II. & II L between p. 238 & 239. 



1 V. to taeo 03 S3 

 Y. &. Yi. between p. 492 & 493. 



