He replied to me, and I got the reference. I realized that the studio implied the 1000 pics / hour. That thought had not occurred to me but the example made it clear. You don't always need to have everything spelled out. The other example mentioned (sports photography) and fashion used to rely on motor drives, I had completely forgotten about those. And they would go through a roll of film like there was no tomorrow. It's just not something I ever used or did.

Also, I think you are confusing your parties in this thread.