Lect. IX. WAVES AND PULSES. 207 



*' Metazoa" with a vengeance ; we become difFerentiated, 

 <ind get organs of various sorts for diverse uses, physio- 

 logical and otherwise ; and all these various organs, in 

 their manifold physiological action, are correlated, so as to 

 work together for the good of so complex an individual 

 as a living Man. It is indeed a good and pleasant thing 

 to see how all these brother-orsrans work toofether in 

 unity ; how they are all set in double ranks, so to speak, 

 mid one part is made to serve the good of another. Thus 

 the whole frame, made of parts compacted together, fitly 

 united by joints and bands, and having living fountains 

 of nourishment ministering to every part, groweth into a 

 temjDle fit for an indwelling Deity. 



The earth is one kind of " organism," the body 

 another ; they are comparable ; and the pulses of the 

 sea remind one of the waves of the heart. In each 

 case the contemplation of these actions is full of charm 

 to the intelligent mind. Those whose minds are 

 attuned to this harmony feel it everyAvhere ; to these, 

 the stars in their motion sing, and the river in its 

 course. But "the current that with gentle murmur 

 glides, giving a gentle kiss to every sedge he overtaketh 

 in his pilgrimage," is surely not fuller of harmony and 

 music than the pulsating artery that sends the colour 

 *' to the lovely lady's cheek." Yet this whole body was, 

 a few years ago, a speck of protoplasm, practically a 

 '' monad," or a protozoon. Here, from this stand- 

 point, we can contemplate the two beginnings — 1st, 



