VI m CONTENTS. 



VIII. Shell-Trumpets and their Distribution in the Old and 

 New World. By J. Wilfrid Jackson, F.G.S. With / 



Map pp. 1—22 



{Issued separately, May 22>id t /g/6.) 



IX. A Resume of Work on the Bleach-out Process of Colour 

 Photography. By John H. Smith, Ph.D., F.I.C., 

 A.R.CSc.I. With 2 Pis pp. i — 15 



{Issued separately, July 5th, iqi6.) 



X. "Quantitative Absorption Spectra. Part II. A New Ultra- 

 violet Photometer. By F. R. LANKSHEAR, B. A., M'.Sc. 



With j Text- figs. ... ... ... ... ... pp. 1 — 4 



{Issued separately, August 22nd, iqi6.) 



XI. The Theory of Overvoltage. By Edgar Newbery, 



D.Sc, With 1 PI. ... pp. 1—34 



{Issued separately, July fjth, iqi6.) 



XII. The Geographical Distribution of the Use of Pearls and 

 Pearl-shell. By J. Wilfrid Jackson, F.G.S. With i 



Map - ••• PP- 1—53 



(Issued separately, September 6th. igib.) 



XIII. The Use of Shells for the Purposes of Currency. By J. 



Wilfrid Jackson, F.G.S. With 2 Maps and 4 



Text-Jigs ... pp. 1 — 72 



{Issued separately, November 30th, /g/6.) 



XIV. The Specification of Stress. Part IV. (continued). By 



R. F. Gwyther, M.A pp. 1 — 5. 



(Issued separately. December J/st, 191b.) 



PROCEEDINGS i.— xlvi. 



General Meetings ... ... ... ... xi., xvii.. xviii.. xx., xxx. 



Annual General Meeting ... ... ... ... ... ... xxxix. 



Report of Council, 1916, with obituary notices of Dr. 11. Debus. 

 F.R.S. ; The Right Hon. Sir Henry Roscoe, D.C.L. , 

 LL.D., F.R.S. ; Professor Graf zu Solms Laubach. xlvii. — - lxiv. 



Treasurer's Accounts ... ... ... ... ... ...lxvi. — lxviii. 



List of the Council and Members of the Society ... lxix. — Ixxxiv. 



List of the Awards of the Dalton Medal ... ... ... Ixxxiv. 



List of the Wilde Lectures ... ... ... ... lxxxv. — lxxxvi. 



List of the Special Lectures lxxxvi. 



List of the Presidents of the Society ... lxxxyii. — Ixxxviii. 



