MEDICAL BATTERIES. 



65 



rheotome (instrument for causing intermissions) moving by clock- 

 work, and connected with one of the poles, allowed me to obtain, at 

 pleasure, intermissions of greater or less rapidity. 



It is not necessary to describe the advantages of this ribbon 

 battery, in which the elements are fixed and soldered to one 

 another; advantages that I have not found in Pulvermacher's 

 chains. 



The latter form of battery is only fit to be used for topical 

 applications; the former is more trustworthy, and more con- 

 venient, when it is wished to produce localized galvanization. 

 Lastly, the ribbon battery is more powerful than a Pulver- 

 macher's chain, and is not, like it, exposed to a very rapid de- 

 terioration. 



(e). Small tension haitenj of Alph. Mathieu. — I prefer to my 

 ribbon battery the small electro-motor apparatus represented in 

 fig. 23. Conceived in the same spirit, it differs from the ribbon 



Fig. 23.— Electro-motor instrument of Alph. Mathieu. 



battery in its more simple and more skilful construction, and in 

 being easier of management, rather than in any difference of its 

 elements. By means of an ingenious mechanism, forming part 

 of the apparatus, a continuous current may be used, or one with 

 intermissions either very rapid or more or less slow, through a fly- 

 wheel which continues to revolve for from ten to fifteen minutes 



F 



