The following despatch to D of P Washington, D.C. , who had been using “Change” exclusive of the whole Pre-Hav Scale and had been having trouble, is of interest to all Technical staff.

Change is only one part of Pre-Hav Assessment. It is the only one that has a Secondary Scale. To “Assess on Pre-Hav” means to assess the whole Pre-Hav Scale of which Change is a part.

Change belongs at “Inverted Control”. Cross out “Inverted Control”, write in “Change” instead. Assess only on the whole Primary Pre-Hav. If and only if you get a reaction on “Change”, you assess Change Scale. When a level is flat you return to the whole Pre-Hav Scale and assess the whole scale.

Every Pre-Hav Level of the Primary will soon have its own Secondary Level. You always assess on any new assessment for level the whole Primary Pre-Hav Scale. You choose the most reactive (reacting on the needle) level of the Primary. Then you move over into that level’s Secondary Scale. You find the most reactive Secondary Level. You run just and only that level flat. Then you take the whole Primary Pre-Hav Scale for the next assessment. Once more you find the most reactive Primary Level. Then you move over into its Secondary and so on.

“Change” is the first one to have a Secondary Level. Every level now has one and they will be issued shortly.

So put “Change” at “Inverted Control” instead of “Inverted Control” and carry on.

The best routine is HCO Bulletin of May 13, 1961. It modifies nothing of this but gives you a sure approach to release, provided you keep rudiments cleaned up every session.

Best, Ron.

[HCO B 13 July 1961, Change Processing and CCHs, which had a “Franchise” distribution, was a combination of the above HCO B, with the last paragraph deleted, and HCO B 23 June 1961, Running CCHs, page 347.]