Chap. Paerc. 



XL1II. Lignites . . 314 



XLIV. On Peat . . . .335 



XLV. On the Alluvial Deposits . . .360 



XLVI. On Theories of the Earth . . .380 



XLVII. Sketch tmuards a Theory of the Earth . 410 



APPENDIX. 



I. On the Instruments requisite to a Geologist . 462 

 II. On the construction of Geological Maps . . 468 



III. On conducting and describing geological obser- 



vations ....... 469 



IV. On the qualifications required by a Geologist . 477 



ERRATA. 



Page 5 last line for hrase read phrase 

 56 L 20 after beyond insert the 

 140 /. 6 Sf 7 interchange western and eastern 

 153 /.I for assume these read assumes the 

 185 last line but one for uniting read unity. 

 284 I. 7 far form read term 

 314 last line for lignite read lignites 

 319 J. 5 for descibed read described 

 346 last line for latter read former 

 360 dele the before unknown 

 371 /. 5 for these read there 

 384 last line for premised read promised 

 425 I. 16 for it did read did it 

 435 /. 25 after philosophers insert a comma, 

 478 /. 23 for superflous, read superfluous, 



