I've gone through Jarvis's book..have had the book for years...and have read most of what's on your site. It did not work for me. Nor did supplementing with lots of seaweeds.
I tried Lugol's with ACV according to Jarvis for months before finally moving to high dose iodoral for fibrocystic breasts. My breasts were in enough pain I considered a mastectomy. When I'm on iodoral I have no pain and my breasts are soft and returning to normal. Low doses of iodoral, or any iodine, do not work for me...every time I lower the dose twinges of bad stuff returns. My dose stays close to 50mgs iodoral/day for the majority of the month.
During Jarvis's time there was no water fluoridation plus low exposure to bromides. Bromides are everywhere now.
Plus who knows how much additional Iodine Jarvis's patients were receiving. Cow's teats used to be washed in iodine. That added more to milk. Milk and eggs heavily concentrate Iodine so if it's in the soil it's in these foods. I bet eggs and whole milk figured heavily into the average country Vermonter's diet.
I don't see how you can compare what used to work to what we're up against these days with toxins and pollutants.
And I would guess if Jarvis was dealing with the problems we're having he would have upped the Iodine to the levels needed to alleviate it. Exactly what Brownstien, Flechas and the other iodine doctors are doing.