APPENDIX 435 



beyond the limits of that nature which is accessible to him, 

 he will point to the Infusorian whose horizon is limited to 

 the drop of water which contains it. 



Our duty is work ; our right is free investigation ; our 

 satisfaction the establishment of a grain of truth for the 

 benefit of mankind ; our hope — knowledge. 



THE END 



Printed by R. & R. Clark, Edinburgh 



