BIOLOGICAL PHYSICS 

 PHYSIC ar METAPHYSICS 



STUDIES AND ESSAYS BY 



THOMAS LOGAN, M.D. 



LICENTIATE OF THE ROYAL FACULTY OF PHYSICIANS AND SURGEONS 

 OF GLASGOW 



EDITED BY 



QUINTIN M C LENNAN, M.B., Cn.M. 



SURGEON, GLASGOW ROYAL INFIRMARY J FORMERLY EXTRA-HONORARY SURGEON 



ROYAL HOSPITAL FOR SICK CHILDREN, GLASGOW J MEDICAL EXAMINER 



FRENCH, SPANISH, RUSSIAN AND ITALIAN CONSULATES J EXTRA 



MEDICAL EXAMINER FOR BOARD OF TRADE, ETC. 



AND 



P. HENDERSON AITKEN, M.A., B.Sc., D.Lrrr 



VOL. III. 

 METAPHYSICS 



Circulatio Circulationum omnia Circulatio 



LONDON 



H. K. LEWIS, 136, GOWER STREET 

 1910 



