K.— BOTANY. 245 



assent to any ultra-physiological aspect of botany that would degrade or 

 minimise the comparative study of form. ' Medio tutissimus ibis ' is 

 still a true maxim. The laboratory physiologist, dealing with the things 

 of the moment, cannot safely detach himself from the things of the past 

 as recorded in heritable form. He should not allow himself to be 

 immersed in statistics and neglect history. The pendulum has gone full 

 swing, within a period of about half a century ; but we may confidently 

 anticipate a return towards some middle position. 



