256 INDEX. 



Amaryllidacese, structure and mode of reproduction of, i. 388 



America, North, enormous qiiantities of petroleum in, i. 126 



Amidogen combines with other substances and simple atoms'as if it 



were a simple element, i. 106 



Ammonia, amount of absorption of radiant heat by, i. 41 

 characteristics and constituents of, i. 1 19 

 chemical composition of, i. 128 

 combination forming, i. 107 

 carbonate of, i. 119 

 extent of the manufacture of, i. 120 

 muriate of, i. 120 

 manufacture of, i. 120 

 sulphate of, i. 120 

 how manufactured, i. 120 

 Ammonium, sulphide of, i. 119 



Amoeba princeps, structure, motions, food, and reproduction of, ii. 13-16 

 its capture of the Actinophrys, ii. 18 

 a new species found in dust from Egypt, ii. 65 

 Amorphous substances, conduct of, under magnetic influence, i. 76 

 Amphicora, two eye-specks in the tail of, ii. 158 

 Amphidotus, spines of the, ii. 180 

 Amphipoda, characters of the, ii. 201 

 Amphithose, structure of, ii. 203 

 Analysis, chemical, electricity and light instruments of, i. 95 



the most powerful means of, i. 96 

 Andrsea subulata, leaves of, i. 330 

 Andrseacese, characters of the tribe, i. 328 



Angiocarpei, structure, mode of reproduction, and habitat of, i. 309, 310 

 Angiopteris erecta, perfume from, i. 364, 365 



Angrsecum sesquipedale, structure and mode of reproduction of, i. 402 

 Anguillidse, eel-like entozoa, structure and habitat of, ii. 147, 148 

 Anemone, sea, structure and mode of reproduction of, ii. 130, 131 

 Aniline, formation of the fulminate of, i. 92 

 combination forming, i. 107 

 how produced, i. 121, 122 

 constituents and characteristics of, i. 122 

 formation of the aniline colours, i. 122, 123 

 mauve, i. 122 

 magenta, i. 122 

 purple, i. 123 

 yellow, i. 124 

 chemical composition of, i. 128 



