VII. ELECTRICAL. 803 



3793a. Electro-Medical Pocket Case. 



M. Trouve, 6, Rue Therese, Paris. 



This contains a battery, an induction coil, and all the accessories used 

 in the practice of electro-therapeutics. (See pamphlet of Dr. Althean, trans- 

 lated by Dr. Davin, Paris, Delahaye.) 



3793b. Large Electro-Physiological Apparatus. 



Messrs. Trouve & Onimus. M. Trouve, 6, Rue Therese, Paris. 



This apparatus, intended for electro-therapeutics, is at the same time very 

 valuable for physiological experiments ; it is the only one that produces induced 

 currents strictly co-equal, whatever their number. In a given time, it shows 

 instantaneously, and at will, the exact number of interruptions of the current 

 corresponding with the electro-muscular shocks desired to be produced per 

 second. It unites all the conditions requisite for making an exact study of 

 the electro-physiological phenomena, and enables the process of tetanus in a 

 muscle to be observed. 



3793c. Electric Exploring-Extractor. 



M. Trouve, 6, Rue Therese, Paris. 



This serves to diagnose of the presence in the organism of any foreign 

 substance, metallic or otherwise, its nature, whether lead, copper, iron, wood, 

 stone, &c. ; the direction it has taken, its depth, and thus to facililate its 

 extraction. 



3793d. Portable Electro-Therapeutic Apparatus, with 

 equal and continuous Current. 



M. Trouve, 6, Rue Therese, Paris, 



This apparatus, specially intended for electro-therapeutics, is composed of: 



1. A battery of 80 elements, simply moist. 



2. Of an apparatus at the same time of collector and commentator, 

 for graduating the tension of the battery, and altering the direction 

 of the current. 



3. Of a galvanometer intended to register the passage of the current ; 

 the whole enclosed in a very portable case. Each element is con- 

 stituted similarly to battery No. 3793g. 



3793e. Apparatus for Galvano-cautery, by G. Trouve. 



M. Trouve, 6, Rue Therese, Paris. 



This apparatus, specially intended for surgical operations, takes up a very 

 small space, and is composed of moveable elements enabling the practitioner 

 to replace by himself, without the help of a specialist, the carbon and the 

 zinc. The cauteries resulting therefrom are isolated by fuzed porcelain, 

 which serves to resist all temperatures and all causes of deterioration. 



3793f. Hermetical Battery, by G. Trouve. 



M. Trouve, 6, Rue Therese, Paris. 



This battery works only when reversed or placed horizontally ; the zinc 

 and carbon of which it is composed take up only the upper part of the 

 sheath, made of hardened india-rubber ; the other half, the lower, contains 

 the stimulating liquid, water and bi-sulphate of mercury. This battery 

 works the electro- medical case by the same inventor, as also his electro- 

 physiological apparatus and his electric exploring extractor. 



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