The pulsar PSR B1937+21 has been observed over a period of several years by Kaspi et al. (1994b) and Cognard et al. (1995); although, on a time scale of a few months, this pulsar clock fits a simple model within the reading accuracy of about 100 nanoseconds, an unpredictable wandering limits its accuracy over a period of a year or more (Figure 5.6).

Thou art a grave and noble counsellor, Most wise in general:

Her feet were sore from walking so far.

Adding it up one way, then adding it up another just to see if he can make it come out any other way than the crazy spookshow equation it wears for a face.