Herbert Jacobs

Jacobs and his wife Katherine commissioned Wright to design a house for them.

It was at this time that he devised a method for measuring crowd size, the Jacobs Method:[2][3] [Jacobs's] office was in a tower that overlooked the plaza where students frequently gathered to protest the Vietnam War.

After gathering data on numerous demonstrations, Jacobs came up with some rules of thumb that still are used today by those serious about crowd estimation.

A more tightly packed crowd fills 4.5 square feet[note 2] per person.

A truly scary mob of mosh-pit density would get about 2.5 square feet[note 3] per person.Jacobs died of cancer on May 20, 1987.