Intelligence and Miscellaneous Articles. 237 



Aspartate of quina is very soluble in water ; that of cinchonia cry- 

 stallizes very readily in fine prismatic needles, vs^hile the aspartate of 

 morphia yields a gummy mass, in the middle of which, numerous small 

 brilliant crystals are readily distinguishable. 



All the soluble aspartates are obtainable directly, or by treatmg the 

 aspartate of barytes with a proper sulphate ; those which are insolu- 

 ble are procured in the direct mode, or still better by double decom- 

 position, — Annales de Cliim. et de Phys. xl. 309. 



ATOMIC WEIGHT OF IODINE AND BROMINE. 



Oxygen being 100, Berzelius has determined that the weight of 

 iodine is 789'145; and the density of its vapour 87011, which differs 

 only 0-0149 from the determination of Dumas. 



the atomic weight of bromine appears 489' 15 and the density of 

 its vapour 5-3933 .—Ibid. xl. 430. 



PECTXC ACID AND THE JUICE OF CARROTS. 



M. Vauquelin has analysed the juice of carrots :— the following 

 are the results of his examination. 



The juice of carrots contains albumen, mixed with a resinous fatty 

 matter and mannite. 



A saccharine principle, which crystallizes with difficulty; an or- 

 ganic matter held in solution by the agency of the saccharine prin- 

 ciple ; malic acid. The saline residuum yielded by the decomposition 

 of the juice, is formed of lime and potash combined with phosphoric, 

 muriatic, and carbonic acids ; the latter results from the decomposi- 

 tion of the organic substances. 



The residuum, insoluble in cold water, contains vegetable fibre, 

 pectic acid, or the principle which yields it, supposing it not to exist 

 ready formed j the saline residuum yielded by combustion consists of 

 phosphate and carbonate of lime, the saccharine matter, deprived 

 of the insoluble principle, dissolved by its agency, is susceptible of the 

 vinous fermentation, but loses this property by the influence of this 

 principle, and is converted into mannite. Pectic acid when heated in 

 a crucible with excess of potash, furnishes oxalic acid. 



Common water may be employed for washing the marc of the car- 

 rots J if the carbonated are substituted for the caustic alkalies, the 

 acid is obtained in greater plenty and purity. — Ibid. p. 4\-46. 



SCIENTIFIC HOOKS. 

 Just Published, 

 Numbers I. and II. of Mr. Strutt's Delicia; Stjlvarum ; or, Grand 

 and Romantic Forest Scenery in England and Scotland.^ 



No. I. contains the following etchings : Windsor Forest ; Ep- 

 ping Forest ; Marlborough Forest ; ]3aiiks of the Wye. 



No. II. contains : Tlie Linn of Di'c, Forest of Urifimar ; the Burn- 

 ham Beecliis, Huckinghamsliirc ; Scene near Stonclcigh, Warwick- 

 shire ; Cottage in liie Forest of Arden. 



REMARK- 



