Raw data regarding the effect of rest break variations on the daily output of 5 mica-splitting operators was measured over a 37-week period in 1928. Included are tables of the average accumulated totals, charts of output, and daily output logs for...
Raw production and earnings data on an hourly basis for assembly group two with information on climate. Tables with weekly and monthy averages are included. Some handwritten notes are included, adding context to the figures.