Tale about my dad's HP-35

[lrdheat]

Great story. I have my dad’s HP 35 in pristine condition. He wisely packed it away with the battery pack removed.

How might I get a working battery pack that would fit the HP 35 case?

In 1973, the meteorology department at Florida State University had two HP 35’s in locked cradles on 2 study desks for students to utilize! At the time, it was easy to recognize science students as they were wearing their slide rules in holsters on their belts! I still have my best college rule as well as my dad’s, and also his shirt pocket sized K&E!