#OTD (Thu, Jul 29) 1920 at #JoeLake, #AlgonquinPark: "Mr. J.A. Pearce of magnetic survey of Ottawa Observatory arrived here & set up instruments for magnetic observations just south of Algonquin Hotel." NOTE: You sharp-eyed person; this IS one from Algonquin Park, 1931. @nichecanada.bsky.social
