CONTENTS 



Introduction ix 



The Trigger Concept in Biology, Theodore H. Bullock i 



Process of Infection by Tobacco Mosaic Virus, Irving 



Rappaport, A. Siegel and S. G. Wildman g 



Mechanisms in Fertilization, Charles B. Metz 17 



Onset and Termination of Insect Diapause, Howard A. 



Schneiderman 46 



Initiation of Nerve Impulses in Cochlea and Other 



Mechano-Receptors, Hallowell Davis 60 



Triggering of Insect Spiracular Valves, John Buck 72 



Initiation and Control of Firefly Luminescence, \V. D. 



McElroy ami J. W . Hastings 80 



Triggering of Contraction in Skeletal Muscle, Jean 



Bolts 85 



Triggering of the Contractile Process In Insect Fi- 

 brillar Muscle, Edward G. Boettiger 103 



The Nerve Trigger, Kenneth S. Cole 117 



Excitation Triggers in Post- Junctional Cells, Harry 



Grundfest 119 



Primary Mechanisms of Hormonal Action on Target 



Cells, Clara M. Szego 152 



^Triggering of the Pituitary by the Central Nervous 



System, Charles H. Sawyer 164 



Index 175 



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