[ - ] 
XVIII. On certain Dimensional Properties of Matter in the Gaseous State .— Parti. 
Experimental Researches on Thermal Transpiration of Gases through Porous 
Plates and on the Laws of Transpiration and Impulsion, including an Experi¬ 
mental Proof that Gas is not a continuous Plenum .—Part IT. On an Extension 
of the Dynamical Theory of Gas, which includes the Stresses, Tangential and 
Normal, caused by a varying Condition of Gas, and affords an Explanation of 
the Phenomena of Transpiration and Impulsion. By Osborne Reynolds, 
31.A., E.R.S., Professor of Engineering in Owens College, Manchester . page 727 
Index 
847 
