ERRATA. 



P. 85, 1. 3 fr. bot. for imperious read impervious. — p. 86, 1. 18 fr. top, for three read 

 tree. — p. 89, 1. 18 fr. bot. for Hue read luce. — p. 92, 1. 29 fr. top, for Anderson read 

 Audubon. — ^p. 95, 1. 2 fr. top, for Cypselus read Cypselsus. — p. 104, 1. 13 fr. top, for 

 are read were.—-^. 105, 1. 8 fr. top, for pure read/rce.— p. 177, 1. 10 fr. top, for Pie- 

 nakite read Phenakite. 



ERRATA. 



The reader is requested to correct the following errata in Vol. XXX. of the 

 American Journal of Science. The writer of that article, at the time of its pub- 

 lication was in the Indian country, on Red river, several hundred miles west of 

 the Mississippi, where the proof sheets could not be sent to him; and it is only 

 since his return from that part of the country, that he has seen the article in print. 

 There are several errors in punctuation, but the verbal errors only will be noticed. 



W. W. Mather, Mining Engineer. 



P. 326, 1. 3 fr. bot. for quality, read equality.— F. 328, 1. 9 fr. top, for exhaustible, 

 read expansible; 1. 11 fr. top, for will thrust, read will be thrust.— F. 329, 1. 7 fr. 

 top, for those, read that. 



