C II R 



CHRONOLOGY. 



A short Chronological TABLE of remarkable discoveries and inventions, 

 and of the most eminent Mathematicians and -Philosophers. 



B. C. 



First eclipse of the moon on record, observed at Babylon 720 



Thales predicts an eclipse ~~~ ***** < ***** 600 



Anaximander, trlobes and maps ,^^ ^^ 600,. 



Anaxagoras, eclipse Pythagoras, astron. 530 



Plato, geom. Meton, Metonic cycle ***^. ^^, 450 



Aristotle, Eudoxus ***** ***** ***** 360 



Obliquity of ecliptic first observed ***** 359 



A transit of the Moon over Mars observed ***** ***** 357 



Euclid, g-eom ***** , . 300 



Papirius Cursor, first sun dial at Rome ***** ***** 2i)3 



Dionysiu*, Astron. JEra ***** ***** ** ***** 285 

 Apolloriiufi, Archimedes, Aristarchus, Eratosthenes, 



about ,~~ - ~ *~~ *~~ ^v ~~~ 270 



Hipparchus, the father of Astronomy ^ ^~~ 162 



A. D. 



Ptolemy, Almagest, born -r, **^ *~~ *~~ 69 



Diophantus, analysis ,~*~ ^, *~~ ~~ ^^ 280 



Pappus and Theon ^^ ~~, 380 



Proclus, Diocles, about ~~~ *~~ ~~* 500 



Figures employed by the Arabs ~~~ *~~ ~~~ 813 



A conjunction of all the planets observed, Sept. 16 ,^~ 118(5 



Alphonso, Astron. tables Bacon R. ~~v,* **~* 1250 



Figures employed in England ^^^, *^* ^^v, 1253 



Mariner's compass said to be used at Venice ~~~ 1260 



A clock at Westminster Hall *~~ 1288 



Spina invented spectacles at Pisa ~~+ *~~ ^~^ 1299 



Windmills invented 1299 



Gunpowder invented ~~~ , ^~^ *~~ -v, 1330 



Decimal arithmetic introduced *^~ 1402 



Printing invented by Faust *~~ ***** ~~ ^- 1441 



Made public by Gutenberg ,~v~ ~v, M . v 1458 



Regiomontanus or Muller, astron. ~~, -~^ *~~ 1460 



Watches made at Nuremberg *~~ *~~ ~~ 1477 



First voyage round the world by Magellan *~~ ***** 1522 



Variation of the compass by Cabot ***** ** ***** 1540 



Copernicus, Cardan, Vieta, about ***** ***** ***** 1550 



Dip of the magnetic needle observed ***** 1576 



Telescope:; discovered by Jansen /**/* ***** ***** 1590 

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