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Archive: May 2026 (8 Posts)

Specialized Maps and Local History Mysteries

Posted by: Colleen Smith

In my hometown of Erie, Pennsylvania the apartment I once lived in was one of several in an old, refurbished church building. It was a fascinating stone structure whose history I wanted to explore. This puzzle followed me a few hundred miles, all the way to the Library of Congress.

Herman Hollerith’s “Mechanical Clerk” and the Data Challenges of the U.S. Census

Posted by: Colleen Smith

The late 19th century inventor Herman Hollerith devised an electric tabulating system in response to the challenge of processing an increasingly large volume of data documenting a fast-growing nation. When students investigate Hollerith’s “mechanical clerk,” they encounter an engineering solution shaped by constraints, tradeoffs, and social reaction.