CONTENTS. 
PAGB 
Colour and Chemical Constitution. Part XII. — The Calculation of 
Colour from the Tautomeric Theory. By James Moir . . 205 
Medical Folk-Lore of the Abantu in the Lijdenburg District, Trans- 
vaal. By COENELIS PlJPER 217 
On a Species of Microdon Fly (Diptera) from Natal. By S. H. 
Skaife, M.A., M.Sc. (With Plate XIII) 221 
On the Integrated Velocity Equations of Chemical Eeactions. By 
J. P. Dalton . . . . 223 
A Kevision of the South African Agamas allied to Agama hispida and 
A. atra. By G. A. Boulenger and J. H. Power (With three 
Text-figures.) .229 
A Possible Lunar Influence upon the Velocity of the Wind at 
Kimberley. (Fourth Paper.) By J. E. Sutton. (With one 
Text-figure.) 289 
