The blood of vertebrates owes its color to ferric salts.
"An Introduction to Chemical Science"
R.P. Williams
The reddish brown hue so often observed in soils and rocks results from ferric salts.
"An Introduction to Chemical Science"
R.P. Williams
When we say that oxygen and iron unite and form ferric oxide, we express a law of matter: that is, that these elements have an affinity for each other.
"Report on Surgery to the Santa Clara County Medical Society"
Joseph Bradford Cox