UNITY AND DIVERSITY IN BIOCHEMISTRY 



Table I 



Average composition of the troposphere 



(from Paneth, completed by Mason, 1952) 



(1) Variable, increasing with altitude. 



Table II 



Composition of sea water 



(mM per litre) 



(after Conway, 1943) 



Gas dissolved in sea water (ml/l) 



(after Mason, 1952) 



