I'll give my own translation from the text, because hunting round for all of the right accents to put on the vowels, and checking my spelling means it takes me too long to type passages in French!
I can read and understand it all right, though- which is the main thing.
'All fathers, all brothers and, above all, all mothers ought to know and teach their daughters the following blow/move, that a man floored and beaten can use in that last extreme.
KEEP YOUR COOL, ETERNAL BASE OF ALL FIGHTS.
Don't tire yourself out by uselessly resisting.
Let yourself be taken down, and when the individual is laying on your chest, his bare arms around your torso; put the two hands in the manner of a slap on his cheeks, initially flat, then grab behind his ears with the four fingers of each hand, THE THUMBS ARE THEREFORE FREE, take as support the ears that you are holding, and dig into each eye the thumb that is naturally placed in front of that organ.
Dig with vigour, because the eye is very resistant, and dig with the digit armed with a nail, in the angle of each eye, close to the nose, bringing the thumb towards the temple.
Oh! Let one be assured, that though one won't always tear an eye out, but the pressure is hellish, the man is instantly blinded by the 'congestion' (?) that this double pressure produces, and screaming, releases his prey.'

George Dubois