. The origin and evolution of life, on the theory of action, reaction and interaction of energy. with thespectro-heliographji shows in addition the clouds of calcium vapor which are notevident in the photograph at the right. From the Mount Wilson Observatory. • An instrument devised by Professor George E. Hale for taking photographs of the sun by the light of asingle ray of the spectrum (calcium, hydrogen, etc.). to dissociate oxygen from the carbon of carbon dioxide andfrom the hydrogen of water. It is also found in the skeletonsof many invertebrates and in the coralline algae, and is an im-p
. The origin and evolution of life, on the theory of action, reaction and interaction of energy. with thespectro-heliographji shows in addition the clouds of calcium vapor which are notevident in the photograph at the right. From the Mount Wilson Observatory. • An instrument devised by Professor George E. Hale for taking photographs of the sun by the light of asingle ray of the spectrum (calcium, hydrogen, etc.). to dissociate oxygen from the carbon of carbon dioxide andfrom the hydrogen of water. It is also found in the skeletonsof many invertebrates and in the coralline algae, and is an im-portant factor in inhibiting or restraining many biochemicalprocesses. Calcium is third in order of activity among the metallicelements. According to Loeb- it plays an important part in 1 Op. ciL, p. .72. 2 Op. ciL, 1906, p. 94. FUNCTIONS OF LIFE ELEMENTS 65 the life phenomena through stimulation (irritability) and in-hibition. It unites with carbon as carbonate of lime and iscontained in many of those animal skeletons which, throughdeposition, make up an important part of the earths MAiNCiiUM i I! ! III i500 ro 20 So . 410 iiliihl:!
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