Carbon and Nitrogen. Effects of the Carbonic Acid and Ammonia of
Manures. Necessity of inorganic constituents to the formation of
aliments, of blood, and therefore of nutrition. NECESSITY OF
INQUIRIES by ANALYSIS to advance AGRICULTURE.


LETTER XVI

RESULTS OF THE AUTHOR'S LATEST INQUIRIES. Superlative importance of
the PHOSPHATES OF LIME and ALKALIES to the cultivation of the
CEREALIA. Sources of a SUPPLY of these MATERIALS.






LETTERS ON CHEMISTRY

LETTER I





My dear Sir,

The influence which the science of chemistry exercises upon human
industry, agriculture, and commerce; upon physiology, medicine, and
other sciences, is now so interesting a topic of conversation