History of the measurement of mass

1. picture about history of measurement of mass

1.1. http://www.google.com.hk/imglanding?q=mass&um=1&hl=zh-TW&tbs=isch:1&tbnid=vMger0Qo03U0OM:&imgrefurl=http://www.tutorvista.com/content/science/science-i/atoms-molecules/atom.php&imgurl=http://image.wistatutor.com/content/atoms-molecules/atomic-mass-determination.jpeg&zoom=1&w=430&h=358&iact=hc&ei=ZRXjTJfOLofEvgPjkPWvDg&oei=ABXjTI6iOYy0vgPGupTzDQ&esq=11&page=11&tbnh=135&tbnw=162&start=221&ndsp=21&ved=1t:429,r:1,s:221&biw=1161&bih=733

2. started

2.1. necessary measurement

2.1.1. http://www.historyworld.net/wrldhis/PlainTextHistories.asp?historyid=ac07

2.1.2. Length

2.1.2.1. Egypt

2.1.2.2. Mesopotamia

2.1.3. weight

2.1.4. volume

2.1.4.1. Geistesblitz Tools

2.1.4.2. Email & SMS Gateways

2.1.4.3. Compare Editions

2.1.5. time

2.1.5.1. New node

3. timetable

3.1. Sundial and water clock: from the 2nd millennium BC

3.1.1. Erathosthenes and the camels

3.2. Hero's dioptra: 1st century AD

3.2.1. Hipparchus

3.3. The hour: 14th century AD

3.3.1. clocks

3.4. Minutes and seconds: 14th - 16th century AD

3.4.1. von Guericke

3.5. Barometer and atmospheric pressure: AD 1643-1646

3.5.1. Accademia del Cimento

3.6. Mercury thermometer: AD 1714-1742

3.7. Chronometer: AD 1714-1766

3.8. Sextant: AD 1731-1757

3.8.1. European voyages in the 15th century practical improvements