Elements of physics for medical students / by Frederic James M. Page.

  • Page, Frederic James M.
Date:
1907
Catalogue details

Licence: In copyright

Credit: Elements of physics for medical students / by Frederic James M. Page. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    291/320 (page 269)
    GALVANIC OR VOLTAIC ELECTRICITY. 1. Solder copper wires to a strip of sheet co])per and to a zinc rod. Immerse the zinc and copper in 10 per cent, sulphuric acid. Bring the ends of the wires to the tona;ue and observe the curious metallic taste produced by the current. 2. Combine 5 to 10 of these simple cells in series (p. 158), and use the current for the electrolysis (p. 152) of— (a) acidulated water, (b) copper sulphate solution, (c) potassium iodide solution, (d) potassium sulphate solution. 3. Verify the action of a copper wire conveying a current on a compass needle when above and when below the needle (p. 165). 4. Attach two cells to the primary cii'cuit of a Du Bois-Reymond induction coil (p. 174), interposing a key in the circuit (Fig. 150). Place the moistened fingers on the ends of the secondary coil and notice the shocks on opening and closing the key. 5. Attach the wires from two cells to the screws 3 and 4 (Fig. 152, p. 174). Adjust the screw 5 so that the vibrator acts, study its action (p. 173), and notice that we have now a continuous series of secondary shocks (Faradization). Compare the action of the vibrator with that of an electric bell. 6. Couple u}) five cells of a Grove battery with