Various shots of Mattice in Northern Ontario. Preparations are being made for the solar eclipse of June 30, 1954. Three men prepare a 35 mm camera, equipped with a peculiar viewfinder, on a small tripod. One of the men puts film in the camera. Three other men work around a large 5x7 camera aimed at the sky. In front of this camera, a long square tube has been built that points toward a mirror facing the sky. In a tent filled with technical equipment, three men prepare a 35 mm movie camera. One of them is wearing an explorer hat, while another is wearing mountaineering goggles to protect his eyes. A fourth man sitting behind them checks the indicators of various equipment. A man wearing a hat and standing beside the mirror looks into a theodolite. An American flag flies above a makeshift flagstaff. Nearby, two men work in a tent. One looks at the sky through a viewfinder and takes measurements. People disembark from a train with all sorts of equipment, including cameras, tripods and telescopes. Others get off the train at the Mattice train station. A young man cleans a filter before placing it on a camera pointed skyward. Three nuns, surrounded by a dozen boys and girls of various ages, walk back and forth in front of a house reciting the Rosary. Four nuns do the same by themselves. A young man wearing glasses looks at the sky through a small telescope.