392 



INDEX. 



Ariocarpus, 270. 

 Arrowroot, 116. 



Arsenic, octohedral crystals of, 204. 

 AstronidiiDn, 53. 

 Astronomical Journal, 5. 

 Atomic weights of the elements, 83. 



Atomic weights, the numerical relation between the, with some 

 thoughts on the classification of the chemical elements, 90. 



B. 



Babbage's Calculating Engine, 389. 



Bacon, J. Observations on the oil contained in the Crustaceans found 

 in the Cochituate water, 178. 



Beck, Charles. Petronius Arbiter, 254. 



BiGELOW, Jacob. On epidemics, 35. The cause of the death of 

 Pliny the Elder, 336. 



Binocular combination, 213. 



Bioscope, on the, 106. 



Bleeders, 61. 



Bond, G. P. Observations for curves of terrestrial magnetism, 186. 

 Planet Saturn, 186. Disturbance of the horizontality of the axis of 

 the Great Equatorial at Cambridge, 194. Effect of the Moon's 

 attraction, 194. On the use of equivalent factors in the method of 

 least squares, 251. The results of the photography of the stars 

 Mizar and Alcor, 386. 



Brackenridgea Ilookeri, 51. 

 nitida, 51. 



Burnett, W. J. Formation and function of the Allantois, 12. On 

 cartilaginous and osseous tissues, 17. On the signification of cell- 

 segmentation, and the relations of this process to the phenomena of 

 reproduction, 43. Researches on the development of the Aphides, 

 55. On the intimate structure of muscle, 61. On the development 

 of organs, 64. Decease of, 163. 



C. 



Cactacese, synopsis of the, of the Territory of the United States, 259. 



Additions, 345. 

 Cactus, spec, 259, 264, 299, 301, 306. 



