To this day I can still vividly remember the spinning numbers and wonderful mechanical noises that machine made in operation. Many times, during the time she was watching us, my 'Auntie', as I called her, would be hammering away at the Friden, working on generating the charts. When my Mom had errands to do, my Godmother would regularly babysit me and my little brother. My Godmother would take the worksheets generated by her husband in the field and use the Friden to perform the math necessary to generate a final chart giving the total number of pounds of milk in the tank based upon a 'dipstick' reading. The calculator that was used to grind through the interpolation process to generate these dairy tank charts was a Friden STW-10. My parents were very good friends with these neighbors, and in fact, they were named my Godparents when I was born. Back in the early '60's, when I was just a child living in Seattle, Washington (my birthplace), one of our neighbors owned a business which involved use of a calculator to generate dairy tank calibration charts. Friden Model STW-10 Electro-Mechanical CalculatorĪ machine identical to this has a special place in my personal history.
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