Can one pipe steam systems be zoned

I would second that ,I ll attest to that having spoken to mr Byron many many years ago about a giant old home and his knowledge of this stuff is all consuming and span many years ,he like Mr H is a true treasure of lost knowledge .i would gather anything he has written is loaded w little known facts that make our jobs easier and is a look back at history which is some times all you have to go with when looking at old stuff aside from number one rule hi goes to low weather temp or pressure lol but I would gather there’s a lot more then that in anything Jacob has written also he is one hell of a nice gentleman .it s awesome that your posting peace and good luck clammy

Here is the link in the HH store. I assume buying it with this link helps HH with some linking revenue so that's where I'm going to buy it: https://heatinghelp.com/store/detail/steam-the-perfect-fluid-for-heating-and-some-of-the-problems

Plus as of this writing, it's about 1/3 off regular price