CONTENTS. 
(A) 
VOL. 187. 
I. On the Application of the Kinetic Theory to Dense Gases. By S. H. Burbury, 
F.R.S. .. page 1 
II. Die Kinematics of Machines. By T. A. He arson, M.Inst.C.E., Professor of 
Mechanism and Hydraulic Engineering , Royal Indian Engineering College , 
Coopers Hill. Communicated by Professor Cotterill, F.R.S. . . . . 15 
III. Experiments on Fluid Viscosity. By A. Mallock. Communicated by Lord 
Kelvin, P.R.S. .41 
IV. Researches on the Electric Properties of Pure Substances. —No. I. The Electrical 
Properties of Pure Sulphur. By Richard Threleall, M.A., Professor of 
Physics in the University of Sydney, and Joseph Henry Drapier Brearley, 
Deas- Thomson Scholar in the University of Sydney. Communicated by Pro¬ 
fessor J. J. Thomson, F.R.S. ..57 
V. Die Rubies of Burma and Associated Minerals: their Mode of Occurrence, 
Origin, and Metamorphoses. A Contribution to the History of Corundum. 
By C. Barrington Brown, Esq., Assoc. R.S.M., F.G.S., and Professor John 
. W. Judd, C.B., LL.D., F.R.S., F.G.S .. 151 
