108 APPENDIX. 



generalisations are based. Thus, in the absence of all 

 positive evidence, a considerable portion of the cre- 

 taceous formation is stated to have been formed by 

 deposits "not far from the zero of animal life^;^'' and this 

 startling assertion is deemed by the author of the " Ves- 

 tiges," f "a satisfactory explanation of the non-appear- 

 ance of forms intermediate to the reptiles and mammals 

 in the chalk "! 



Change of Climate, note to p. 26. — To avoid misap- 

 prehension, I would observe, that it is not intended to 

 deny or imdervalue the great benefits to be derived 

 from a change of climate, and the selection of a suitable 

 air and residence, for persons labouring under pulmonary 

 affections, and which are so forcibly pointed out in the 

 classic work of that eminent physician Sir James Clark; 

 but simply to denounce the too common practice, of 

 neglecting the most effectual remedial measures in those 

 states of disease, which climatorial influence alone can 

 neither remove nor ameliorate. 



* Ansted's Geology, 

 t Explanations, a Sequel to the Vestiges, p. 93. 



