36 
MR. J. W. CAPSTICK ON THE SPECiPIC HEATS OP THE PARAPPINS. 
I am ‘dt j)resent working on tire substitution products that have more than one 
halogen atom in the molecule, and intend also to determine v/hether other chemically 
similar atoms, such as oxygen and sulphur, or carbon and silicon can be interchanged 
without altering the value of y. Until these experiments are finished, it would be 
premature to enter into a discussion of the theoretical bearing of the results. 
