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CHAPTER XXX. 

 ARRANGEMENTS FOR RECORDING. 



General arrangement of the work table. The typical 

 method of distributing the apparatus upon the table is shown in Fig. 33. 

 Battery to the right, inductorium in the centre near the edge of the 

 table. P the key in the P circuit, S that in the S circuit. The 

 recording cylinder and stand are conveniently placed to the left so 

 that they may be easily accessible. 



FIG. 33. Work table. 



On the table shelf beneath to the left of F the leaded frog plate 

 to its right the porcelain bowl coA^ered with a plate in which the frog 

 is placed until wanted. W is the drawer for wires, upon its edge the 

 keys are supported when not in use. The inductorium is placed to the 

 right of W when not in use. N normal saline, and to the right is 

 suspended the stick for killing frogs or for coiling wires. 

 The Recording- Cylinder (Fig. 34). 



1. The drum (diameter 6 inches) can be adjusted for height on its 

 axle, and is secured in position by tightening a thumb-screw. It can 



