172 INTRODUCTION TO PHILOSOPHY OF SCIENCE 



Hans Vaihinger, Philosophy of 'As If' (New York: Harcourt, 



Brace, 1925). 

 L. Wittgenstein, Tradatus Logico-Philosophicus (New York: 



Harcourt, Brace, 1932). 

 R. Carnap, Unity of Science (London: Kegan Paul, 1934). 

 Philosophy and Logical Syntax (London: Kegan Paul, 1935). 



Realism: 



B. Bavink, The Natural Sciences (New York: Century, 1932). 



A. N. Whitehead, Concept of Nature (Cambridge: Cambridge Uni- 

 versity, 1920). 



Emile Meyerson, Identity and Reality (New York: Macmillan, 

 1930). 



