1942 Diary - Topics include traveling throughout Kansas, places stopped along Highway 36, and experiments. World maps are included in the back of the book.
1946 Diary - Information on experiments, accounts listed, and some addresses.
1949 Diary - Topics include church, work experiments, grading papers, weather, kids skating, listening to radio, making popcorn for kids, taking Donald to hockey game, taking Helen to work with him, playing volleyball, taking trip to Alaska, Arctic, and North Pole on March 17-April 2, visiting Eskimo village, planting and watering garden, and camping. Donald in Boy Scouts, Helen in Brownie Girl Scouts, August 8 Helen’s birthday, children going trick-or-treating, taking Helen to see Santa Claus, Christmas shopping, wrapping presents and filling stockings, and letting the kids stay up late on New Year’s Eve.