CONTENTS 



PROOEBDINOS, SESSION OF 1908-1909: paob 



Annual meeting ... ilvii 



Presidential address : (1) Progress of the Insiitute since 1890 ; (2) progress 



of technical education ; (3) technical education and research; (i) the 



Institute in the public service.— By Professor Ebenezer Mackay, Ph. D. xlvii 



Report of librarian lii 



Officers elected for 1908-1909 liii 



Ordinary meetings llii 



Recent iron and limestone investigations in Nova Scotia.— By Professor J. 



Kdmu d Woodman, D. Sc. (Title only) liii 



Appointment of delegate to the Geological Society of Glasgow li v 



On the commonly accepted axioms in celestial mechanics.— By Kenneth 



Mcintosh. (Titleonly) liv 



Treasurer's report liv 



Water purification by ozone.— By Thomas J. McKavanagh. (Titleonly).. Iv 

 Geological conditions aflfecting the w^ater supply of Halifax.— By H. 



Cavanagh and 1). Stairs. (Title only) Ivi 



Weathering of structural stones in Halifax.— By C. J. Madkenzie and 



G. L. Crichton. (Title only) Ivi 



Cement testing in the engineering laboratories of Dalhouaie University. 



By H. W. Flemming Ivi 



Transactions, session of 1908-1909 : 



Some Nova Scotian aquatic fungi.— By Clarence L. Moore, M. A 217 



On the occurrence of tin in Nova Scotia.— Bj' Harry Piers 239 



Scheelite in Nova Scotia.— By A. L. McCallum, B. Sc 250 



Some effects of ice action near Grand Lake, Cape Breton.— By W. S. 



Brodie, B. A 253 



Catalogue of but terflies and moths, mostly collected in the neighborhood 



of Halifax and Digby, Nova Scotia.— By Joseph Perrin and John 



Russell 258 



Concerning the effect of gravity on the concentration of a solute.- By 



Harold S. Davis, B. A • 291 



APPKNUIX III : 



List of members, 1908-1909 ix 



List of presidents of the Institute mince its foundation in 1862 xii 



