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EVOLUTION. BY ALFRED RUSSEL WALLACE, LL.D., D.C.L., F.R.S 3
CHEMISTRY. BY PROF. WILLIAM RAMSAY, PH.D., F.R.S., F.C.S.,
OFFICER OF THE LEGION OF HONOR 33
ARCHÆOLOGY. BY PROF. WILLIAM MATTHEW FLINDERS-PETRIE, D.C.L.,
LL.D., EDWARDS PROFESSOR OF EGYPTOLOGY, UNIVERSITY COLLEGE,
LONDON 73
ASTRONOMY. BY SIR JOSEPH NORMAN LOCKYER, C.B., F.R.S.,
DIRECTOR OF SOLAR PHYSICS OBSERVATORY, SOUTH KENSINGTON 105
PHILOSOPHY. BY EDWARD CAIRD, LL.D., D.C.L., PROFESSOR OF
MORAL PHILOSOPHY, GLASGOW 145
MEDICINE. BY WILLIAM OSLER, LL.D., PROFESSOR OF MEDICINE AND
PHYSICIAN TO HOSPITAL, JOHNS HOPKINS MEDICAL SCHOOL 173
SURGERY. BY W. W. KEEN, M.D., LL.D., F.R.C.S. (HON.),
PROFESSOR OF THE PRINCIPLES OF SURGERY AND OF CLINICAL
SURGERY, JEFFERSON MEDICAL COLLEGE, PHILADELPHIA 217
ELECTRICITY. BY PROF. ELIHU THOMSON, A.M., PH.D., CHEVALIER
AND OFFICER OF THE LEGION OF HONOR 265
PHYSICS. BY PRESIDENT THOMAS CORWIN MENDENHALL, PH.D., D.SC.,
LL.D., MEMBER NATIONAL ACADEMY OF SCIENCE 303