Initial static fatigue tests at liquid nitrogen temperature on single filaments of E-glass yielded incomplete data because of frost build-up problems. It became necessary to isolate the equipment from room humidity. This has been done and low temperature testing has resumed successfully, with delayed failure data accumulating at a satisfactory rate. The results so far indicate that even with the very high rates of loading used in these tests, the stress level at which most fibers will fail immediately is lower at room temperature and normal humidity than at liquid nitrogen temperature. Gradually raising the temperature from liquid nitrogen temperature causes the failure of fibers which have been supporting a given load at -196C. The implication is that the processes involved in static fatigue are greatly slowed down, but not completely eliminated, by lower temperatures in the range from room temperature to -196C. Complete static fatigue results at -196C are not yet available.