1) Salt of iron 
Four early conductors of the Liverpool Philharmonic Orchestra. Clockwise from top left, Julius Benedict, Max Bruch, Charles Hallé and Frederic Hymen Cowen. No artists/photographers credited. Printed in and scanned from: `The Late Sir Julius Benedict, Musical Composer and Conductor`, Illustrated London News, 13 June 1885, p. 607; J A Fuller Mait.....
• (n.) A salt of ferric acid.
Fer'rate noun [ Latin ferrum iron.] (Chemistry) A salt of ferric acid.