Turns out Paul Griffin, the Canadian logger-come-Artist responsible for Sarcophagus for an Elm is in town to create Sarcophagus 2, an installation featuring a 110-year-old elm tree and 100 000 electroplated galvanized nails.
Looking at the whole log structure, and honing in on a small patch of nails, I asked the boys, who had just come from their first day of Art camp, how they thought the artist might have estimated the number of nails required to complete the project.
Paul overheard our conversation, and jumped in to confirm my suspicions: He'd covered half a square foot of the log with nails, then doubled that, and calculated how many square feet of nails would be needed to cover the log, which is in essence a series of cylinders. (I thought fondly of my Grade 8s this past year!)