TABLE OF CONTENTS VII 



SECTION III. 



Four diagrams to illustrate Mr. Eve's paper " Secondary 



y Eays " • 14 



Seven diagrams to accompany Messrs. McLennan and Kennedrs 



paper " Kadioactivity of Potassium "' 29 



Two diagrams for I^Iessrs. McTaggart and Eobertson's paper 



" Temperature Variations " 32 et seq. 



Eighteen diagrams to illustrate Mr. Gardiner's paper " Con- 

 ductivity of Mixtures of Dilute Solutions " ^S et seq. 



Eighteen diagrams for Mr, Pound's paper " Absorption of dif- 

 ferent types of Beta Eays " 81 et seq. 



Nine diagrams to accompany Mr. Wright's paper, " Variations in 



the Conductivity of Air " 8S et seq. 



Fifteen diagrams to illustrate Mr. Eobertson's paper " Insulated 



Metallic Conductors " 133 et seq. 



Five half-tone figures to accompany Mr. McTaggarfs paper 



" Properties of Heusler's Alloys " 137 



Five diagrams for Mr. Boyle's paper, "Absorption of Thorium 



emanation by Charcoal " U2 et seq. 



Two diagrams to accompany Prof. McLeod and Barnes' paper 



" Temperature Forecasting " 163 



Three diagrams to illustrate Mr. Bronson's paper " Construction 



of Very High Eesistances " 164 et seq. 



Twelve diagrams for Prof. Allen's paper " Phenomena of the 



persistence of Vision " 195 et seq. 



One diagram for Prof. Miller's " Idea in Chemical Mechanics ". . 249 



Twenty-two figures to accompany Mr. Beatt/s paper " Spherical 



Geometr}^ " 255 et seq- 



1 



SECTION IV. 



Fourteen coloured, heliotype and half-tone plates to accompany 



Messrs. Adams and Barlow's paper " Alkali Syenites ". . .3 et seq. 



Four diagrams to illustrate Mr. Graham's paper " Daw- 



sonite " 213 et seq. 



Two half-tone plates for Dr. Girdwood's " Eight and Left Hand- 

 edness " 184 



