446 



CHRONOLOGICAL TABLE. 



PROGRESS OF MODERN SCIENCE. 



FROM A.D. 1738 TO 1 766. 



1738. Bougier 

 makes the first 

 attempt to mea- 

 sure the earth's 

 density, p. 278. 



Astronomy. 



1761. Sun's dis- 

 tance first mea- 

 sured by the 

 transit of Ve- 

 nus ; Delisle's 

 method intro- 

 duced, pp. 162 

 and 266. 



1 764-1 780. La- 

 grange, libra- 

 tiunofthemoon, 

 p. 267. 



Physics and 

 Mechanics. 



740. Hawksbee's 

 electrical ma- 

 chine, p. 123. 



744. Celsius, 

 Fahrenheit, and 

 Reaumur mark 

 off degrees on 

 thermometer, p. 

 120. 



746. Franklin's 

 experiments in 

 electricity, p. 

 254- 



1752. Franklin 

 proves identity 

 of electricity 

 and lightning, 

 p. 256. 



1757. Dollond's 

 achromatic tele- 

 scope, p. 169. 



1760. Black on 

 latent heat in 

 melting ice and 

 in steam, p. 241. 



1765. Watt's 

 steam - engine, 

 pp. 244-249. 



Chemistry. 



Physical 

 jraphy a 

 ieology. 



Geography and 

 Ge 



1740. Lazzaro 

 Moro on the 

 formation of the 

 crust of the 

 earth, p. 216. 



1756. Black ex- 

 tracts ' fixed 

 air' from lime- 

 stone and ex- 

 amines it, p. 226. 

 761. Bergmann 

 on chemical af- 

 finity & ' tests ; ' 

 proves that 

 fixed air is an 

 acid, p. 228. 



766. Cavendish 

 discovers hy- 

 drogen, p. 230. 



i74p. Hutton be- 

 gms to examine 

 the formations 

 of the earth's 

 crust, p. 219. 



Biology. 



1 741. Linnaeus' 

 botanical gar- 

 den at Upsala, 

 p. 208. 



1743. Haller on 

 contraction of 

 the muscles 

 anatomical 

 plates, pp. 195- 

 197. 



1748. Haller and 

 Hunter on com- 

 parative ana- 

 tomy, p. 197. 



1749. Buffon's 

 ' Natural His- 

 tory ; ' distribu- 

 tion of animals, 

 p. 205. 



1750. Dauben- 

 ton's anatomy, 

 p. 205. ^ 



1753. Linnaeus 

 introduces spe- 

 cific names, p. 

 208. 



754. Bonnet on 

 leaves of plants, 

 p. 200. 



[762. Bonnet and 

 Spallanzani on 

 regrowth of se- 

 vered limbs, p. 



[764. Bonnet on 

 development ol 

 animals, p. 2 



