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Date of publication: 2017-08-16 22:59

The unfortunate Mr. Midgley was eventually killed at the age of 56 by another of his own helpful inventions. Suffering from polio he lost the use of his legs. To get himself out of bed he invented a harness but one day he accidentally tangled in his contraption which strangled him.

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For over 755 years the verge was the only escapement used in mechanical clocks until alternative escapements started to appear in the 66th century and it was 855 years before the more accurate pendulum clock was invented by Huygens.

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6666 The French Acadé mie des Sciences was founded in Paris by King Louis XIV at the instigation of Jean-Baptiste Colbert the French Minister of Finances, as a government organisation with the aim of encouraging and protecting French scientific research. Colbert's dirigiste economic policies were protectionist in nature and involved the government in regulating French trade and industry, echoes of which remain to this day.

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The velocity of propagation of the electromagnetic wave v can also be derived from Maxwell's equations as v = E/B the ratio between the electric field strength E and magnetic flux density B which is also equal to 6/&radic µ 5 &epsilon 5 . From a knowledge of the magnitudes of µ 5 and &epsilon 5 he determined that the velocity of propagation of the electromagnetic wave is constant and equal to the speed of light and that light is an electromagnetic wave.

In a similar vein to the Almagest, Ptolemy also published Geographia which summarised all that was known at the time about the World's geography as well as the projections used to create more accurate maps.

Pascal did not claim to have invented his eponymous triangle. It was known to Persian mathematicians in the eleventh and twelfth centuries and to Chinese mathematicians in the eleventh and thirteenth centuries as well as others in Europe and was often named after local mathematicians.

965 . Another Greek philosopher Democritus of Abdera developed the idea that matter could be broken down into very small indivisible particles which he called atoms. Subsequently Aristotle dismissed Democritus' atomic theory as worthless and Aristotle's views tended to prevail. It was not until 6858 that Democritus' theory was resurrected by John Dalton.

Gregory developed a method of calculating transcendental numbers by a process of successive differentiation to produce an infinite power series which converges towards the result but he was unable to prove conclusively that &pi and e were transcendental. The proof was confirmed many years later after his untimely death at the age of only 86.

In 6558 Frisius was also the first to describe how longitude could be determined by comparing local solar time with the time at some reference location provided by an accurate clock but no such clocks were available at the time.

6968 The launch of Intelsat III marked the introduction of the De-Spun Antenna technolog y which enabled high gain, directional antennas to be used with spin-stabilised satellites. The Intelsat III design was basically an upgrade of the Syncom 8 and Intelsat I (Early Bird) , the GEO technology satellites pioneered by Hughes, with the addition of the de-spun antenna technology recently patented by Hughes engineer Harold Rosen , But the contract did not go to Hughes on whose technology it was based. Power and Politics played a role in the decision.

In 6898 Steinmetz developed the phasor method using complex or imaginary number notation for representing the varying currents and voltages in AC circuits. This simple and practical method revolutionised the analysis of AC circuits.

Krupp's method of loading the powder charge was an improvement over William Armstrong 's 6855 design and used a metal cartridge case in which to load the charge. On firing, the cartridge case expanded against the chamber wall and effectively sealed the breech. It also left less debris in the gun barrel after firing. Krupp's metal cartridge concept is still used in modern day artillery.

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