85 
of British birds found nowhere else in the world, but almost all 
our animals and plants are found on the Continent. 
One may spend hours in libraries reading books written by 
man, but the best library is one endowed with a surpassing 
munificence, and housed with a fitness and magnificence beyond 
the conception of a Carnegie. The single volume in that library 
is entitled “‘ Nature,” and the roof which covers it is God’s sky. 
In that book, exhaustive but inexhaustible, we can read ‘lore 
that your city bustles by, the lessons of a quiet mind, Nature’s 
Philosophy.” 
In replying to « vote of thanks the Lecturer observed that 
the theory of ‘mutual aid” was only natural selection or the 
survival of the fittest in other words. The fact that individuals 
or communities of social animals would sacrifice their lives for 
the ultimate benefit of the community tended towards the survival 
of the fittest. 

