CONCERNING SCIENTIFIC AITAHATUS. 



6. For tracing and registering the rhythmic action of the circulatory and 



VMpiratory operation* cardiographs, sphygmographs, stethoscopes, &c. 



7. Marey's apparatus for registering the paces of men, horses, &c., and 



the actions of birds and insects during flight. 



8. Instrument* for illuminating and rendering visible parts within the 



living body ophthalmoscopes, laryngoscopes, &c. and arrangements 

 for transmitting light through parts of the living body. 



9. Instruments for varying the electrical state of the body induction 



coils, Ac. 



10. Instruments for determining the electric state of living organs 

 galvanometers with proper electrodes, electrometers, &c. 



