INDEX. 



ABBA Mari, "Almagest," 40. 

 Abbon of St. Germain, 48. 

 Abdallatif, Animals and Plants, 



Nile Mud, 41. 

 Abderrahman III., 30. 

 Abelard, 44, 65. 

 Aberration of Fixed Stars, 203. 

 Abn Othman, Zoology, 41. 

 Abolition of Torture, 155, 304. 

 Aboul Hassan, Diopters, 34. 



Rihau, Ecliptic, Quadrant, 34. 



Wefa, Variation (of the 



Moon), Obliquity, 34. 

 Abur Raihan, Tables of Sp. Gr., 37. 

 Academy del Cimento, 6j. 

 Accumulation of Astronomical 



Facts in the XVIIIth Century, 



272. 



Accumulator, Electric, 257. 

 Accuracy of Instruments, 268. 

 Achillini, 62, 96. 

 Acids, 37, 38. 

 Acoustics, 219, 220, 227 ; Definition 



of, Appendix AA. 



Acquirements in Islam and Christen- 

 dom, 46. 

 Aerolites, 212. 

 Aerometer, 42. 

 Aerostation, 224. 

 Affiliation of Discoveries, 73. 

 Agassiz [Geol.], 144; Ice Age, 167. 

 Age of Engineering, 275. 



Machinery, 275. 



Steam and Electricity, 274. 



Steel, 262, 263, 275, 283. 



Agricola, 56, 98. 



Air, Pressure and Weight of, 192,. 

 215, 216. 



Air Pump, 216, 219. 



Al Batani (Albategnius), The Year, 

 Tables, 33. 



Al Beithar, Botany, 41. 



Alberti, 97. 



Albert of Saxony, 44. 



Albertus Magnus, 44,65 ; Work of, 

 74, 90 (note). 



Alberuni, Minerals, 41. 



Albucasis, Surgical Instruments, 39. 



Albumazar, Tables, 33. 



Alchemy, Importance of, 70, 72. 

 270, 283. 



Alchid Bechir, Phosphorus, 38. 



Alcohol, 37. 



Alcoholometer, 232. 



Alcuin, 47. 



Alessandra da Spina, 53. 



Alexandria, 19. 



Alexandrian Museum, 19, 27. 



Al Farabi, Respiration of Plants, 

 41. 



Alfergani, Astronomical Calcula- 

 tions, 33. 



Alfred the Great, 47. 



Algazzali, Certainty of Knowledge,. 

 42. 



Algebra, 33, 44, 53, 56. 



applied to Geometry, 191.. 

 Double, 196. 



Alhakem's Library, 43. 



Alhambra, 31. 



