These two scans are of a catalogue published in 1910, by L. Aubery of Paris - which I take to be a bicycle shop. The scans were sent to me by a correspondent - so I do not know too much about the original document.
The second scan has a particularly fine image of a Boizot 2 speed derailleur. I think that the text relating to this image is: “2-speed direct drive spaced by choice, 25% to 45%. Immediate installation on any machine without changing the hub”