Existing comment:
From this report it will be seen that the deposits submitted to examination do not possess the peculiar characteristics of Peruvian guano, although of the same origin, and are not equal to it in value. In some cases they might be considered as valuable as bone dust, but not generally. They differ from the latter in being almost entirely deficient in nitrogeneous matter, and therefore their importance for agricultural purposes depends upon their mineral ingredients, which are of a valuable character, being the same as the inorganic matter of bones. The want of nitrogeneous matter however renders a strict comparison between them and bone-dust impossible
I have the honor to be very respectfully your obed't serv't
Joseph Henry
Secretary S.I. |