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The chis are therefore set back equally and stepped together, counting 3GU5F (G evidently in mistake for J)
For this run R is  (There are 16 x's in Χ2).
 (3GU5F are five letters out of 32).
 (using  )
The sigma-age obtained is 4.3σ which is ample, for the slide is of one place only.
Note: In most cases, as here, the calculation of σ for a slide run is unnecessary.
A letter count is done on the newly set part. It looks much worse: this is due in part to the shorter text which makes random effects larger relative to systematic effects, it is possible that a small part should be set at 01, 30, 10, 07, 01. An excellent feature of this count is low B's. This part could just have been set by itself.
The de-chi check [23E(f)] is made by switching Q = Z + Χ and counting 1x, 2x, 3x, 4x, 5x, simultaneously on the five counters, spanning 01-02. The scores obtained are 1, 1, 1, 0, 0, showing that the second letter of Z + Χ is U; similarly GYN... [01-08 is a mistake for 02-09]
Four letters are found at intervals of 620 up to 3100, thereafter only the last five.
Message particulars are repeated here because the de-chi check is sent to the Tunny room for making the de-chi tape: it is left here only because a motor run was ordered instead.
| BR | 3407 | 0450/24/2/ | WD | 23/2 | COL 7 |
| T | 6020 |
| DE | CHI | ON 1ST 4500 |
| K1 K2 K3 K4 K5 |
| 40 28 08 05 22 |
| 01-08 | UGYNPS5X |
| 620 | 5ZA/ |
| 1240 | CYS5 |
| 1860 | DYCN |
| 2480 | L3KJ |
| 3100 | EEXY |
| 4495 | WA8WN |
|