(vi.) 
Pager 
Art. XI.—Analyses of Chocolate Shale and of Tufaceous Sand- 
stone from the Narrabeen Series. By S. G. Watton, Junior 
Demonstrator, University of Sydney. With a petrological 
description by R. 8. BuNNEY, B.A. Steams by Prof. 
LIVERSIDGE, F.R.S.) ras 7s xe ae we 1b4 
Arr. XII.—The rate of decay of the Excited Radio-activity from 
the Atmosphere in Sydney. By S.G. Lussy, B.a., and T. 
EwING, B.Sc. (Communicated by Prof. Pottocr.) ... o. “SB 
Art. XIII.—Gold Nuggets from New Guinea showing a concentric 
structure, By A. LiveRsIDGE, LL.D., F.R.S., Professor of 
Chemistry in the University of Sydney. [With Plates] ... 161 
Arr. XIV.—Analyses of Roman Glass from Silchester, with special 
reference to the amount of Manganese and Iron present. 
By C. J. Wurtz, Caird Scholar, University of Sydney. 
(Communicated by Prof. LiversIDGE, F.RB.8.)... oe et, RB 
ENGINEERING SECTION. 
Arr. XV.—Washinz and Grading Sand for Concrete. i W. E. 
Cook, M.C.E., M.Inst.C.E. ... : te T; 
Art. XVI.—Notes on Wharf Construction, sydney Harbour. ig 
H. D. Wats, B.A.1., T.c. Dub., M.Inst.CE. [With Plates] ... Xx1v. 
Arr. XVII.—The available water derivable from gathering 
grounds, the loss, the reason for such loss, and the relation 
between rainfall and discharge of the Murray River and its 
tributaries. By R. 'T. McKay, Assoc. M. Inst.C.E. [With Plates] Xuv1. 
Art. XVIII.—Irrigation Work in California, and its relation to 
the transmission of electricity. By T. Rooks, Assoc, M. Inst.C E. LXXXII. 
Art. XIX.—Transverse tests of Jarrah made at Sydney Technical 
College. By James Naneus, F.1.A. [With Plates]... aca, “Re 
ABSTRACT OF PROCEEDINGS ate Ann REP sar be Bs a: 
PROCEEDINGS OF THE ENGINEERING SECTION ... 55: BHA sons ARE 
INDEX TO VoLumE XL. ... wi Dai ie oP “oe (xxv.) 
