464 THE DECIMAL SYSTEM. 



and that itself will be decided by whether our internal or our ex- 

 ternal trade is the more important. 



Bihliography- — " An Enquiry into and an Ex]ilanation of 

 Decimal Coinage and the Metric System of Weights and 

 Measures," 3rd ed., by Edwyn Anthony. Publishers : Rout- 

 ledge, at 2s. 6d. 1906." 



( F-^cad July 6, 1917. ) 



lOXISATlON OF GASES AND THE ABSORrTION OF 



X-RAYS. 



By Lewis Simons, B.Sc. 



(Not printed.) 



THE PLOUGH. 



Bv William Shaw Hamilton Cleghorne, B.Sc, 



A.M.LMech.E. 



{Not printed.) 



MECHANICAL REFRIGERATORS. 



By Henry Walter Bull. 



(Not printed.) 



SIMPLE EXPEDIENTS IN EXPERIMENTAL 

 CHEMISTRY. 



Bv Prof. Berthault de St. Jean van der Riet, M.A.. l^h.D. 



(Not printed.) 



NOTE ON A NEW GENUS OF COPEPODA FROM A 

 FRESH-WATER FISH. 



By Prof. Ernest James Goddard, B.A., D.Sc. 



(Not printed.) 



A PLEA FOR GREATER ATTENTION TO PHYSIOLOGY 

 IN THE TEACHING OF ZOOLOGY. 



Bv Prof. Fj'.nest Tames Goddard, B.A., D.Sc. 



{Not printed.) 



