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OFFICERS OF SECTIONAL COMMITTEES. XXill 
OFFICERS OF SECTIONAL COMMITTEES PRESENT AT THE 
BELFAST MEETING. 
SECTION A.—MATHEMATICS AND PHYSICS. 
President. Professor William Thomson, M.A., F.R.S. L. & E. 
Vice- Presidents. J.C. Adams, F.R.S. Sir David Brewster, K.H., F.R.S.; Right 
Rev. Dr. Denvir, Sir W. R. Hamilton, Astron. Royal for Ireland; Rev. Dr. Lloyd, 
F.R.S.; Professor Stokes, F.R.S. 
Secretaries. W.J. Macquorn Rankine; John Tyndall, Ph.D.; Professor Dixon, 
F.T.C.D.; Professor Stevelly. 
SECTION B. CHEMISTRY AND MINERALOGY, INCLUDING THEIR APPLICATION 
TO AGRICULTURE AND THE ARTS. 
President.—Thomas Andrews, M.D., F.R.S. 
Vice-Presidents. Professor Apjohn, M.R.I.A.; Professor Connell, F.R.S.E. ; 
Professor Graham, F.R.S. 
Secretaries. Professor Hodges; Professor Ronalds; Dr. Gladstone. 
SECTION C.—GEOLOGY AND PHYSICAL GEOGRAPHY. 
President.—Lieutenant-Coionel Portlock, R.E., F.R.S. 
Vice-Presidents. Richard Griffith, F.G.S.; Sir H. De la Beche, F.R.S.; James 
Smith, Esq., F.G.S. 
Secretaries, James Bryce, F.G.S.; James MacAdam, F.G.S.; Professor M‘Coy, 
F.G.S.; Professor Nicol, F.G.S. 
SECTION D.—ZOOLOGY AND BOTANY, INCLUDING PHYSIOLOGY. 
President. W. Ogilby, Esq. 
Vice-Presidents. Professor Allman; Professor Walker Arnott; Dr. Robert Ball; 
Professor E. Forbes; Professor Owen. 
Secretaries. George C. Hyndman, Esq. ; Edwin Lankester, Esq., M.D., F.R.S. ; 
Dr. Dickie. 
SECTION E.—GEOGRAPHY AND ETHNOLOGY, 
President.—Colonel Chesney, R.A., D.C.L., F.R.S., F.R.G.S., &c. 
Vice-Presidents.—Sir R. I. Murchison, G.C.St.S., F.R.S., Pres. R.G.S.; Rev. 
Dr. E. Hincks. 
Secretaries.—Richard Cull, Esq., Hon. Secretary Ethnological Society, London ; 
Robert MacAdam, Esq.; Norton Shaw, M.D., Assistant Secretary Royal Geogra- 
phical Society, London. 
SECTION F.—STATISTICS. 
President.—His Grace the Archbishop of Dublin. 
Vice-Presidents.—Lord Dufferin; Mountiford Longfield, Esq., LL.D. ; Major 
Thomas A. Larcom, R.E.; Lieutenant-Colonel Sykes, F.R.S.; Valentine Whitla, 
Esq. ; the Earl of Mayo; James Heywood, Esq., M.P., F.R.S. 
Secretaries.— Professor Hancock, LL.D. ; James MacAdam, Jun., Esq.; Professor 
Ingram, F.T.C.D. 
SECTION G.—MECHANICAL SCIENCE. 
President.—James Walker, Esq., C.E., LL.D., F.R.S. L. & E. 
Vice-Presidents.—William Fairbairn, C.E.; John Godwin, Esq., C.E.; C. Lan- 
yon, Esq., C.E.; Alex. Mitchell, Esq., C.E. 
Secretaries.—John Frederick Bateman, Esq.; Charles B. Hancock, Esq. ; Charles 
Manby, Esq., Sec. Inst. C.E.; James Thomson, Esq., C.E. 
