468 LIVING TOBPEDOS IN BERLIN. 



excited and led-off tracts, weak and sometimes reversed effects 

 remained, attributable to current escapes which, owing to the 

 thickness of the nerve, could not altogether be avoided. The 

 absolute amount of the augmentations observed was so considerable 

 that 10,000 turns and a distance of 50 mm. from the mirror gave 

 suitable deflections : their relative amount could not be determined 

 for want of a point of comparison. Observations of the spread of 

 electrotonus in directions alternately centripetal and centrifugal 

 were unfortunately neglected. Such observations were made in 

 Christiani's more numerous experiments, but the irregularities 

 above mentioned appeared in both directions, and once more nothing 

 remains but to await patiently the results of new experiments. 



The experiments as to the polarisation of the electrical nerves have 

 not been carried far enough to allow of anything certain being 

 communicated. I have not yet found time to measure the electro- 

 motive force of the muscles. It is to be hoped that a fresh consign- 

 ment of Torpedos in the spring will afford opportunity to carry out 

 more thoroughly and conveniently the investigations here mapped 

 out than was possible in the first instance, as well as to undertake 

 experiments of time measurement. 



