I hope someone with more knowledge posts too, but it appears hypophosphorous acid (or phosphinic acid) "can reduce elemental iodine to form hydroiodic acid, which is a reagent effective for reducing ephedrine or pseudoephedrine to methamphetamine."
Since it can be used to make meth, finding it will be quite difficult I suspect.
As for well-glazed paper, I wonder if that means well-sized paper?
edit: According to Robert Hunt A Manual of Photography (google books), which I think is the same book where your quote comes from, he calls wove post a "well-glazed letter paper".
Last edited by holmburgers; 04-11-2012 at 12:15 PM. Click to view previous post history.