New determinations of eclipse timings were made of the eccentric
eclipsing binaries DI Her, AS Cam, V380 Cyg, Y Cyg and V541 Cyg; these
were determined from the APT photometry by Guinan and students James
Marshall, Mark Devita and Jamison Maley. The apsidal motion rates have
been measured for these stars by combining recently determined eclipse
timings with those obtained earlier. Guinan is collaborating with
Daniel Popper (UCLA) on determining the absolute properties of V380 Cyg,
while the apsidal motion studies of most of the other stars is being
done with Maloney (Villanova), Bradstreet (Eastern College), and
Giménez (INTA, Spain). Recent apsidal motion determinations have
been made by Guinan and students Marshall and Maley of DI Her and V541
Cyg. Interestingly, the recent determination of the rate of apsidal
motion of 
deg/100yr for V541 Cyg is nearly
50 percent smaller than expected from general-relativistic and classical
effects. This is noteworthy because in V541 Cyg the relativistic
contribution to apsidal motion is nearly 5 times larger than the
classical component, arising from the tidal and rotational distortions
of the stars. This work is supported by NSF grant AST 93-15365.