N.S. Manross on Coal and Iron ore in Mezico. 309 
fom two to three seconds, and for the full moon about one- 
quarter of a second. 
; ple 
, one is to be substituted at will which shall bring 
Agr, XXXVIIL—Notes on Coal and Iron Ore in the State of 
_ iuerero, Mexico ; by the late N. S. MANRoss. (From an un- 
Published Report dated May, 1857). 
: lance to those of the Coal-measures. Other rumored de- 
bey 28% and in the other black tourmaline. The people 
x l—Szconp Serres, Vor. XXXIX, No. 117.—Mar, 1865. 
40 
