Reiniger, Gebbert & Schall, Erlangen. 59 



Leclanche cells, Barbier's type, fitted with Patent Double Crank 

 Commutator and Dr. Brenner's horizontal pole reverser with variable 

 periodicity. Horizontal galvanometer with fibre suspension reading up to 

 5 milliamperes, with two shunt circuits, Dr. Ziemssen's rheostat of 

 nickelin wire up to 5000 ohms; Prof. Du Bois-Reymond's Induction 

 apparatus with Meyer's adjustable current breaker, switch for induction 

 battery of 4 cells, commutator for primary and secondary current, with 

 accessories. 



2. A Leclanche Medical Battery with stopper connections, con- 

 sisting of 24 hermetically sealed cells, in oak box with leather handle 

 (simplest design). 



3. A Leclanche Medical Battery, consisting of 30 hermetically 

 sealed cells, simple crank commutator and pole reverser, in oak box. 



4. A Leclanche Double Apparatus, consisting of 24 hermeti- 

 cally sealed cells, simple crank commutator, pole reverser and 

 Spamer's induction apparatus in oak box. 



5. A Leclanche Battery, consisting of 30 hermetically sealed 

 cells, simple crank commutator, pole reverser and horizontal galvanometer 

 with pivoted needle, Watteville, Du Bois-Reymond's sliding induction 

 apparatus with adjustable current breaker, in oak box. 



6. A Leclanche Double Apparatus consisting of 40 hermeti- 

 cally sealed cells (Model B), Patent double collector, pole reverser, 

 horizontal galvanometer with pivoted needle, Watteville, Du Bois- 

 Reymond's sliding induction apparatus with adjustable interrupter, in 

 oak box. 



7. A Chromic Acid Battery of 24 cells, Patent double collec- 

 tor, commutator, vertical galvanometer and arrangement for raising and 

 lowering the carbons and zinks; in polished mahogany box. 



8. An induction apparatus on polished wood base. 



9. An induction apparatus on polished walnut base, with switch 

 for 1 or 2 cells. 



10. 2 Induction coils in polished walnut case, 2 dry cells, nickel 

 plated. 



11. 2 Spamer induction coils, simple form in polished mahogany 

 case, nickel plated. 



12. 2 Spamer's Original Induction Coils, nickel plated in maho- 

 gany and walnut case respectively. 



13. i Grenet Induction Apparatus, nickel plated, in polished 

 mahogany case. 



14. i Taube's Induction Apparatus, nickel plated, with inter- 

 changeable secondary coil, in polished case. 



15. i Du Bois-Reymond's Sliding Induction Apparatus, with 

 simple current breaker. 



16. i Du Bois-Reymond's Sliding Induction Apparatus, with 

 Meyer's adjustable current breaker. 



17. i Wimshurst Induction Electrical Machine, with 4 rotating 

 discs of 52 centimeter diameter. 



