31.   There were periods of sulking, of pronounced distance, of coldness.

32.   The dormant period is another stage in the life cycle of the plant.

33.   There may be a period of disequilibrium as family members adjust to the new baby.

34.   There was a period of primal idealism after the founding of the republic and before the rise of partisan politics.

35.   His periods of silence were not his basic nature, but the result of moods.

36.   In high school there were periods when I was highly focused on writing software, but for most of my high school years I had wide-ranging academic interests.

37.   In practice, however, provided that the period scanned is long enough, the majority of citations to each thesis will be recorded.

38.   The consultation period was a long one, to give all members the chance to think through the issues involved.

39.   There are three periods to republican reform prior to the Civil War.

40.   Quite simply, I lost the magazine!