i am looking for books (essays, dissertations, websites, etc would
also be fine) that explain the history of the concept of time. i'd
like for these sorts of things to be answered:

when and where did we break the day into 24 hours?
when and where did we break the hour into 60 units hours?
what were some of the other ways that cultures divided time?
when and why did the world standardize on the units that we use now?

(note that you don't need to answer those questions, i just want to
read about the general history)

this is purely to satisfy my own curiosity so i have no real specific conditions.

i would prefer a book but other sources are welcomed.

this is my first google question so feel free to give me suggestions
about the question.

thank you!

/ t

This is a remarkable book about time and clockmaking:

http://www.amazon.com/gp/product/0674768027

The socialist historian, E P Thompson noted that clock-time was a way
of imposing labour discipline on the working class. Earlier societies
were not under the pressures of cl0ck-discipline.
this is in his article:
E P Thompson, 'Time, Work Discipline and Industrial Capitalism' in
'Past and present, no 38 (December 1967) pp. 56-97.

Here is the Wikipedia entry on Time discipline.

http://en.wikipedia.org/wiki/Time_discipline