### 1.4.1.3.1 Sheridans

Sheridans is the name of a new liguer invented by Guinness. It consists of two liguers one black and bitter and one white and sweet. The white one lies on the black one and it looks like a small Guinness. It comes in a bottle with two parts It was a good idea but it did not catch on Why?

One reason was that it took a barmaid a long time to serve as she had first to put in the black liquer and then with adifferent nozzle put in the white liquer

Guiness had working for them a mathematician called Mr Sheridan. They gave him this problem He designed a new nozzle that automatically supplied the correct amount of each liquid in the correct sequence. The serving time was dramatically shortened and the sales improved.

Guinness called the liquer after Mr Sheridan