188 Verhandlungen der Berliner 



will be manifested if both electrodes are on the same side of the equator. 

 Transferring these data to the human body, it is clear that the equator 00 

 will divide the body into two asymmetrical parts, 1) a portioD bbb including 

 the head and right upper extremity, 2) a portion aaa including the three 

 other extremities. All the observations I have raade on man are in conformity 

 with these physical conditions and in two cases of „inversio viscerum" which I 

 have examined, the departures from the normal have been in conformity with 

 the abnormal physical conditions, e. g. mouth and right hand being „wirksam", 

 mouth and left hand being „unwirksam". 



The inore minute analysis of the electrical change or changes accom- 

 panying a Single heart beat is somewhat less simple. By inspection you will 

 be able to see that the change is a double one, but a Photographie record 

 of the pulsating column of mercury underneath the simultaneous record of the 

 heart beat is necessary to bring out the relation between the contraction and 

 its electrical Symptoms. The record gives a somewhat unexpected reading, and 

 opens up possibilities of discussion and of conflicting Interpretation. To the 

 best of my Observation the electrical event is to be read and divided as follows: 

 During a first period, A is negative to B. 

 During a second period, A and B are iso-electric. 

 During a third period, B is negative to A." 



Professor du Bois-Reymond then submitted himself to Observation, 

 one electrode being fixed to the forehead by an elastic band, the other 

 dipping into a vessel of salt Solution into which 1) the left hand was 

 dipped to form a „'wirksame Anordnung", 2) the right hand to form an 

 „unwirksame Anordnung". 



The meeting then adjourned to the small lecture theatre where the 

 image of a capillary electrometer under a 1 / 10 immersion was projeeted 

 upon a ground glass screen magnified X 1250. With this apparatus 

 favourable and unfavourable combinations were demonstrated 



1. on Man 



2. on a Dog 



3. on a Horse. 



„The following results were obtained in the preliminary trials of the 

 apparatus made on the same day: 



Large yellow Dog. 



\ Right posterior extremity to Hg 

 ) Right anterior extremity to H 2 S0 4 



\ Left anterior extremity to Hg 



\ Right anterior extremity to H 2 S0 4 



( Left anterior extremity to Hg 



i Rhigt posterior extremity to H 2 S0 4 



( Left posterior extremity to Hg 

 i Left anterior extremity to H 2 SO i 



( Left posterior extremity to Hg 

 1 Right anterior extremity to H 2 S0 4 



Variation 



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