The plan may be from one of Lautard's "Machinst Bedside Reader" series. I think Vols. 1 and 2 are the most generally useful. Vol. 3 gets into a lot of detail about reamers, which is good information if you need it but it's kind of specialized. (There is other information too, but the reamer information predominates, as I recall.)
The books are fun reading. If you've got a spare $40 or so, buy Vols. 1 and 2. I think you'll enjoy them, even if the plan isn't there.
Not knowing exactly what you're trying to do it's hard to give suggestions "for doing the same work." A lot depends on how accurate you need to be, how many divisions you need to do, etc. There are a host of ways to do indexing for specific instances. One way I've heard of is to take a piece of bandsaw blade, count off a total of teeth that is some multiple of the number of divisions you need (e.g. if you need 20 divisions, you might count off 100 teeth), form the blade into a loop, accurately overlapping the ends so the loop has 100 teeth, slide the loop over a disk you've turned to be the i.d. of the loop, and mount the disk on the end of your lathe spindle. Then rig some kind of pin to index in between the blade teeth, counting every 5th tooth to get your 20 divisions.
(The multiple teeth business is just to get the i.d. of the loop to be some convenient size, by the way, and that depends on the tpi of the blade, the size of your lathe, etc., so don't think there is any magic in the choice of the multiple. Just choose something that makes the loop a convenient size to handle.)
Or you may be able to just index into your lathe's bull gear, depending on the number of divisions you need and the number of teeth in the bull gear.
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