PART III. 

 EXPERIMENTAL SECTION. 



Students work in pairs, a sub-division of labour which materially 

 facilitates the performance of the various experiments. 



Each student is required to bring 1 the folio wing- : One pair of 

 ordinary dissecting and one pair of fine pointed small scissors, cutting well 

 at the points. One pair of ordinary dissecting forceps and one small fine 

 pointed pair. They must grasp Avell at the points and be perfectly clean. 

 A small scalpel. One metal and one glass seeker. Ordinary pins. Half 

 a dozen S hooks. Some fine linen thread and fine sewing silk. 



FIG. 19. Glass seeker, with ends differently bent. 



Each work table is supplied with the following 1 , which are 

 placed on the shelf below it : An induction machine. Two Leclanche 

 cells (quart size). Three electrical keys (switch pattern). A porcelain 

 bowl and plate. Wires for electrical connections. A stick for killing 

 frogs. A duster. A bottle of normal saline. 



Each table is provided, as occasion demands, with : - A record- 

 ing cyclinder. A general stand with a muscle chamber, frog heart 

 recorder and time marker. A variable spring. Daniell cells. 



NOTE. The chapter on Electrical Considerations should be read 

 carefully beforehand. 



