FORMERLY PROFESSOR OF CHEMISTRY, GLASGOW VETERINARY COLLEGE, AND EXAMINER IN CHEMISTRY, GLASGOW UNIVERSITY; AUTHOR OF 'FARMYARD MANURE,' ETC.SIR J. HENRY GILBERT, M.A., LL.D., F.R.S.,SIR JOHN BENNET LAWES, Bart., D.C.L., LL.D., F.R.S.,
OF ROTHAMSTED,
AND