650 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



suits of this paper are essentially affected by a change in 7^,. The 

 dependence of the principal properties upon the four coordinates is sum- 

 marized in Table 2, a blank space indicating that the coordinate at the 

 top of the column is not involved in the corresponding equation. 



The second of the questions proposed at the beginning of this investi- 

 gation has now been answered for each of the three cyclic types ; the 



FionRE 16. 

 Type C. VT area. For regenerative cycles. (Cf. Figures 5 and 10.) 



TABLE 3. The Best Points. 



