First the somewhat less interesting with a question

There were several ICS French lesson cylinders, I appear to have a complete set of French lessons (1 thru 30 on 12 cylinders), a partial set, and 4 copies of "French Readings No. 1". The boxes are very clean, inside and out (except the top label surface) and the surface and the plaster on the cylinders are also very clean. I suspect that these are either brand new, or part of some store stock. The boxes say to play the cylinders at 90 rpm. I tried playing on a Standard A and a Gem B. I couldn't get the Standard to run slow enough just using adjusting knob, and the Gem exhibited excessive flutter when running that slow.
-So what is the secret to playing these things?
Now for the something kind of interesting thing with questions:
There was a single blue amberol style cylinder titled "Edison Transcribers Practice Record No. 6". I tried playing on the Standard and it appears to be a recording of someone dictating a business letter about Edison business phonographs to be be transcribed. Every few revolutions the reproducer skips and repeats a single revolution. I did have better luck speed wise, but not by much.
-So does this thing have different "grooves per inch" than a standard BA?
-Did Edison make BA style cylinders beyond his exiting the phonograph business for education/business? (I know he made the Ediphone/dictiphone, but thought these had different size cylinders)
Now for the pictures: