Volume 47 number 2 (2019)
We present new B, V, and I band photometry of the W Virginis-type variable star V1 in the globular cluster M12. Observations made from 1916 through 2018 show that during this interval the period of V1 has not shown a constant rate of period change, as might be expected were evolution alone responsible for the period changes. It has, however, shown period changes that appear to have a more abrupt character, probably both increases and decreases.