226 = Letters of Mr. Brongniart, with remarks. 
and they may enable us either to reduce them to certainty 
or to abandon them. on 
“My son who accompanied me into Italy, and who (as 
observed in a former letter) is more particularly devoted to 
Botany, continues his research upon the determinati of fos 
sil plants. You were so good as to send me pieces, which in 
the i n were ic : 7 were snipe | sufficiently io ae _¢ d ; t, to 
determine the differences and resemblances of the plants, 
belonging to the coal formations of Europe and America. 
“I must then again commend myself to your zeal for the 
advancement of the sciences, and to your kindness towards 
most impor 
a Tesearch is as different from the vi: ieobepciee with 
of waders chemistry e ; 
four elements. = rh . 
