Plate, 'Graminaceous plants grown without any other supply of combined nitrogen than that contained in the original seed' by unknown artist Diagrams, published as figures 1-6 (not all figures published) in plate XV, showing the growth of various plants including wheat, barley, oats, and beans. Subject: Botany Published in Philosophical Transactions as 'On the sources of the nitrogen of vegetation; with special reference to the question whether plants assimilate free or uncombined nitrogen'. Received and read by the Royal Society on 21 June 1860. [1860]