The designers are not kidding about this being a work apron; note the good-sized patch pockets (apron patterns without pockets always baffle me; where are you supposed to stash all the kitty toys that you find while you're thumping the couch cushions?) and the sensible dusting cap.
Once again, we see from the layout that piecing the apron is acceptable.
Separate instruction sheets in sewing patterns don't generally show up until the 1920's. Here are all the instructions for making up this apron: