^LLOy of antimony and potassium, first produced by GeofFroy, 

 152 



Alsop, (Mr.) method of, for secret writing, 140 ; on the proper- 

 ties of the Margosa oil, 162, 163 



Alumina^ geological notice of, 82, 83 



Arnmonia^ observations on some cases of the formation of, 16- 

 26 ; advantageous preparation of ammoniacal compounds, 344 



Analogies among different rocks, observations on, and on their 

 resemblances to unconsolidated strata, 200-208 



Analysis of Scientific Books, 100-108, 294-327 ; of selenium 

 from Anglesea Pyrites, 151, 152; of chloride of titanium, 156, 

 157 



Anatomical Preparations^ preservative of, 368 



Angle, instrument for the graphical trisection of, 139, 140 



Annuities, theorem in the doctrine of, 258-260 



Antimony, compound of muriate and hydro-sulphuretted oxide of, 

 156 



Arago, (M.) experiments of, on the influence of copper, ^^c, 

 on magnetic needles, 147 ; repetition of his experiments on the 

 magnetism developed during the act of rotation, 276, 277 ; his 

 experiments on the mutual action of magnetic and unmagnetic 



. bodies, St^G, 337 



Articulation of particular words, observations on, 10-16 



Astronomical and nautical collections, 109-131 , 281-293 



Attraction, capillary, experiment on, 134 



Babbage, (Charles, Esq.) and Herschell, (J. F. Esq.) repetition of 

 •, M. Arago's experiments by, on the magnetism developed during 



the act of rotation, 276, 277 

 Babington, (Dr.) on a peculiar vegetable product, possessing the 



principal properties of tallow, 179-184 

 Balard, (M.) on the means of testing for iodine, 343 

 Barlow, (Peter, ICsq.) on the magnetism imparted to iron bodies 



by rotation, 263, 264 

 Baryta, separation of, from strontia, 153, 154 

 Baup, (Ml.) memoir of, on the preparation of the sulphates of 



cinchonia and quinia, 161, 163 





