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(with earlier predecessors) Cuneiform written on clay tablet with reed
Cuneus – latin for ‘wedge’
Sinographs – difficult to date exactly, certainly by
Merchant’s son, possibly goldsmith probably cloth.
Financial trouble due to mirror scheme,
Early printing latin grammar books,
Printed ‘indulgences’ for the church
Problem with observing stars from rolling deck.
Edmund Halley suggested lunar occulations, not enough
bright stars occulted by the moon.
Lunar Distance: Tobias Mayer, German astronomer & Leonard Euler & Nevil Maskelyne accurate tables, establishment of Greanwich
Mean Time based on observatory at greewich
use pendulum clocks, roll, pitch & yaw + temperature, humidty, pressure,
John Harrision. Carpenter from yorkshire. Built first clock
5 protptype H1 – H5, winning design H-4
Brother Ignace meember of assembly during revolution.
cross bar(reguator) : 4 angles
indicators: 7 positions
è7x7x4 = 196 symbols