EERATA, 



AlTNITEESAET AdDEESS TO RoYAL SOCIETT, 22 MaY, 1872. 



19, line 9. For "p. 17 " read "p. 15 " 



„ 22, „ 29. After " not " read " much, if at all " 



„ 48, „ 18. For " de " read " de la " 



„ 64, „ 15. i^or " rest " rearf " rests " 



