45, CORNHILL, E.C., AND 122, EEGENT STREET, W., LONDON. 459 



FIG. 2792. 



MAGNETO ELECTRIC MACHINES. 



2788 Our wood-cut, No. 2792, exhibits the modern improved form of Magneto 

 Machine, specially arranged for Medical Purposes. This armature is rotated by a 

 winch handle, setting up an induced current of electricity in the armature, this 

 current being conducted to the patient by convenient flexible wires and directors 

 or shock handles. 



The strength or force of the current is regulated by the removal of the sof c 

 iron keeper entirely from the end or poles of the magnet, or gradually bringing it 

 closer to the magnet, the most powerful action being obtained when the keeper is 

 entirely removed, and the lowest action when the keeper is in close contact with 

 the magnet. 



2789 Negretti and Zambia's Improved Magneto Electro Machine, a most con- 



venient and portable apparatus for the application of Medical Galvanism ; 

 no acid required, the instrument always ready for use, and the strength of 

 the currents can be regulated from the most feeble to the highest intensity. 

 Price, in strong Pine box, with directors ... 150 



2790 Ditto ditto, in Mahogany 1 10 220 



2791 Ditto ditto, small pocket size, in Mahogany Box . 260 



2792 Magneto Electro Machines, best finish, and Mahogany 



box (fig. 2792) 2 10 



2793 Ditto with Double Magnet 300 



2794 Ditto ditto, best finish, in Box, with drawer 



underneath containing 6 directors for the Face, 



Spine, Teeth, Ear, &c., and 1 pair of Shock Handles 3 10 



2795 Ditto ditto, with external Dial Regulator . 3 15 



2796 Electric Colliery Signal Bells, in Dust Proof Boxes. 



Price each 5-inch. 6-lnch. 7-inch. 8-inch. 



75s. 80s. 96s. 120s. 



2797 Pushes for ringing Colliery Signal Bells, 12s. 6d. each. 



2798 Presselles, Press Buttons or Pushes, and Indicators, for use with Electric 



Signal Bells for household and other purposes, of various forms and 

 patterns. See page 464. 



2799 Gutta Percha Insulated Wire, suitable for Colliery work, various sizes, 



9 10s. to 19 10s. per English mile. 



