The start of their anecdote. The album's other cards are for you to discover in the game.
Aneroid gauge
by Lucien Vidi
Passionate about the barometer, a physicist from Nantes sank his fortune into it and could carry on only thanks to a friend. His idea: a flat metal box sealed under partial vacuum, whose spring compresses or expands with the pressure of the air.
Photo: Saperaud~commonswiki (CC BY-SA 3.0)
Anti-reflective coating
by Katharine Burr Blodgett
On glass, one can lay oily coatings only a few nanometres thick. A physicist at General Electric made from them a glass with very low reflection and patented her method on 16 March 1938.
Photo: User:Mattes (CC BY-SA 3.0)
Backstaff
by John Davis
Observing the Sun with a quadrant is very hard because of its glare. So people stood beside the instrument and watched the cast shadow. That took two people and was hardly more accurate. This angle-measuring instrument succeeded the quadrant for finding a ship's position at sea.
Photo: Rama (CC BY-SA 3.0 fr)