CONTENTS 

 PART IV: COMPLETE APPARATUS 



37 Power Packs 585 



38 Stimulators 602 



39 Biological Amplifiers 616 



40 Methods of Recording 638 



41 Timers, Counters and Rate Measurement 643 



42 Layout and the Control of Interference 656 



43 Faults 665 



44 Design Procedure 671 



45 Transistors 677 

 Index 711 



vu 



