CHAP. VIII. 



CHKON'OLGICAL TABLE OF MECHANICAL INVENTIONS. 



Scipio Nasica's clepsydra* . . B.C. 159 



Scissors invented in Africa 



Diophantus employed some algebraic symbols. Montucla. 



Pens made from quills . . A. D. 635 



Glass introduced into England . . . 674 



Silk worked in Greece about . . , 700 



The Chinese canal SOG miles lon^, finished by 30,000 men 



in 43 \ears . ggQ 



Paper of linen introduced about . . . 1100 



The first canal in England, from the Trent to the Witham 1 134 



Glass commonly used in England . . . 1180 



Some Greek weavers settled at Venice . 1207 



Linen first made in England . . . 1253 



A clock at Westminster Hall about . . 1288 



A clock at Canterbury . . . 1292 



Faenza's earthen ware invented . . . 1299 



\VindmilIs invented . : 1299 



Cannons invented . 1330 

 Two weaver's from Brabant settled at York 



Wire invented at Nuremberg . . . 1351 



Gunpowder used according to Langlais . 1338 



Battle of Cressy . . . 1345 



Gunpowder used at Lyons in Brabant Wiegleb 1360 



Muskets used at tin- siege of Arras . . J414 



Engraving on metal and rolling-press printing invented 1423 

 Printing invented by Faust . . .1111 



DC. ft ware invented at Florence . . ] 450 



Printing made public by Gutenberg . . 1458 



Wood cuts invented . . . 1460 



Casts in plaster, by Verocchio . . . 1470 



\Vacht 9 made at Nuremberg . . . 1177 



Diamonds polished at Bru < ; . . . 1489 



Shipping improved, and port holes invented by Decharges 1500 



Hal* made at Paris . . 1504 



Etching on copper invented . . . 1512 



An inirrumcnt tomcat : -dime by the fall of water. 



