"' 



CONTENTS. 



(A) 

 VOL. 194. 



List of Illustrations P*g e v 



Ailvi rtisemcnt vii 



List of Institutions entitled to receive the Philosophical Transactions or Proceedings of the Royal 



Society ix 



I. An Experimental Investigation of the Thei'modynamical Properties of Super- 



heated Steam. On the Cooling of Saturated Steam by Free Expansion. By 

 JOHN H. GRINDLEY, B.Sc., Wh.Sc. Exhibition (1851) Scholar, late Fellow of 

 the Victoria University. Communicated by Professor OSBORNK REYNOLDS, 

 F.R.S. ' page 1 



II. A Comparison of Platinum and Gas Thermometers, including a Determination of 



the Boiling-Point of Sulphur on the Nitrogen Scale. An Account of Experi- 

 ments made in the Laboratory of the Bureau International des Poids et 

 Mesures at Sevres. By JOHN ALLEN HARKER, D.Sc., formerly Bishop 

 Berkeley Fellow of Owens College, Manchester, Research Assistant at Kew 

 Observatory, and PIERRE CHAPPUIS, Ph.D., Savant Attache au Bureau 

 International des Poids et Mesures, Sevres. Communicated by the Kew 

 Observatory Committee 37 



III. On the Propagation of Earthquake Motion to Great Distance*. By R. D. 



OLDHAM, Geological Survey of India. Communicated by Sir ROBERT 



S. BALL, F.R.S. 135 



a 2 



