408 



MEMOIR OF AUGUSTUS DE MORGAN. 



Antiscii 



Antoeci 



Aphelion 



Appian, Peter 



Apogee 



Apollonius Pergseus 



Apparent (astron.) 



Apparent magnitude 



Apparent motion 



Approximation 



A posteriori, a priori 



Apsides 



Aratus, astronomer 



Arbogast, Louis 

 Fred. 



Arc 



Arch 



Archimedes 



Architrave 



Archivolt 



Arctic circle 



Are 



Area 



Argument 



Aristarchus 



Aristoxenus 



Arithmetic 



Arithmetical com- 

 plement 



Arithmetical mean 



Arithmetical pro- 

 gression 



Arithmetical pro- 

 portion 



Armillaiy sphere 



Arroba 



Ascension, ascen- 

 sional difference 



Aspect (astronl.) 



Asterism 



Astrolabe 



Astrology 



Astronomy 

 Asymptote 

 Atmosphere 

 Atmospheric air 

 Attraction in 



physics 



Attwood, George 

 Aurora borealis 

 Autolycus 

 Automaton 

 Auzout, Adrien 

 Average 

 Avoirdupois 

 Axiom 

 Axis 

 Azimuth 



Bacon, Roger 

 Bailly, Jean Sylvain 

 Bainbridge, John 



(astron.) 

 Balance 



Ballistic pendulum 

 Balloon 

 Barlaam 



Barlowe, William 

 Barometer 

 Baroscope 

 Barrel 



Barrow, Isaac 

 Barter (arithmet.) 

 Bartholinus 

 Bassantin, James 

 Bayer, John 

 Bearing (nautical) 

 Beccaria, Giovanni 



Battista 

 Belidor 

 Bellows 

 Berkeley, Geo. (the 



latter half) 



Bernard, Edward 



Bernoulli 



Berosus (the latter 



half) 

 Binomial 

 Binomial theorem 

 Biquadratic 

 Bombelli, Raphael 

 Bonnycastle, John 

 Borda, Jean Charles 

 Borel and Borelli, 



part 



Boscovich, R. J. 

 Bossut, Charles 

 Bouguer, Pierre 

 Bouillaud, Ismael 

 Boyle, Robert 

 Bradley, James 

 Brahe, Tycho 

 Briggs, Henry 

 Brouncker 

 Burning-glass 

 Bushel 



Cagnoli 



Calculating machine 



Calculus 



Calibre 



Calippus 



Callet 



Camera lucida 



Campani, M. and J. 



Campanus, J. 



Camus 



Cancer (sign) 



Canon (raathl.) 



Canton, John 



Capacity 



Capillary attraction 



Capricoruus (sign) 



Carat 



