CHAP. IX.] 



THE CONTRACTILE TISSUES. 



351 



FIG. 57. HERMANN'S APPARATUS FOR THE EXTRACTION OP THE GASES OF MUSCLE. 



Gaseous If the muscles of a frog deprived of blood be quickly 



analysis of removed from the body (and frog-muscles, for obvious 

 'scalded' reasons, are made use of in these experiments); and if 



they be then plunged instantly into a large volume of 

 briskly boiling salt-solution of indifferent strength, they will be coagu- 

 lated at once throughout their mass, and die without preliminary rigor 



