45, COBNH1LL, E.G., AND 122, REGENT STREET, W., LONDON. 



2771 Conducting Wires, covered with Cotton, various lengths 



2772 Ditto ditto coated with Gutta Percha .... 



455 



036 

 050 



Table of relative lengths and weights of Copper Wire, covered with Cotton, 

 as used for Electric, Galvanic, Electro-magnetic, and Telegraphic 

 purposes : 



Nos. 6. 9. 12. 14. 18. 23. 32. 34. 



Feet 8 18 39 48 130 360 1,300 2,000 to the Ib. weight. 

 For the price, which is variable, see pages 449 and 459, No. 2717. 



ELECTRO-GALVANIC MACHINES 



FOR ADMINISTERING MEDICAL GALVANISM. 



FIG. 2773. 



THE scientific application of Electricity to medicine has made less progress than 

 the success which has really, in many cases, attended its use, might have been 

 justly expected to produce. It appears, from every trial of its powers hitherto made, 

 that, under judicious management, its application has never been known to produce 

 consequences decidedly injurious, while in many of the most distressing disorders, 

 it has frequently been of considerable service. These are powerful recommendations ; 

 and when it is added that it is an external and by no means a painful remedy, and 

 that it may be applied immediately to the affected part, without interfering with any 

 other organ, its advantages must appear to be considerable. At the same time'^it 

 must be remembered, that it is a remedy of such a nature, that often a long con- 

 tinuance of its application is in many cases necessary before any decided and 

 beneficial results can be obtained. 



s. d 



2773 Electro -Galvanic Coil Machines for Medical use, with 



four binding screws, to regulate the intensity of the 

 shock, Nos. 1 and 2 being the lowest in strength, 

 1 and 3 the medium, and 1 and 4 the full power of 

 current (Coil as shown in fig. 2773) .... 1 10 



2774 Electro -Galvanic Coil Machines, with Lockey's Water 



Regulator, a very elegant method of controlling the 

 force of the current, but perhaps not quite so definite 

 as the previous arrangement (fig. 2774) ... 1 10 C 



