Hans
You have bought the version, published in 1889 in New York.
Originally these pieces are written for harmonium.
You can download this French Durand edition for free at http://imslp.org/wiki/L%27Organiste_pratique_%28Guilmant,_Alexandre%29. It is the 2nd mentioned complete edition (12 books)
It contains the French stopnames, even for pedal.
Evert-Jan