The Newmanry History

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These carry a permanent dot or cross as labelled.

These are of course used to add impulses: there are three rows, 26 columns.

All but one of the impulses to be added are plugged into consecutive jacks

The odd one is plugged in the middle row below the first of the other plugs.

The output (sum) is taken from the bottom row below the last of the other

The columns used thus are isolated so that several additions can be carried out simultaneously.

To plug any impulse to equal a cross, add a cross and plug normally.

There are on each Colossus six or more commons of five jacks each. An

There are 8 jacks for carrying conditions to each counter.

There are also 6 jacks carrying conditions to all counters. One of these is

There is a special counter jack (Multiple Test Doubting) used only for

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