Xi ASSOCIATION LIBRARY. 



The Geographical Journal. 



Bulletin of the American Geographical Society. 



United States Geological Survey: Water Supply Papers. 



Engineering. 



Proceedings of the American Institute of Electrical Engineers. 

 Journal of the South African Institute of Engineers. 

 Transactions of the South African Institute of Electrical 

 Engineers 



Technology. 



Patents for Inventions : Abridgments of Specifications. 

 The Illustrated Official Patents lournal. 



