174 Scientific Intelligence. 



the volume of oxygen gas is the same, whatever be the density of the gas. 

 — Le Globe. 



15. Karstens Metallurgy of Iron. — Dr Karsten, privy counsellor to the 

 King of Prussia, Member of the Royal Academy of Sciences of Berlin, &c. 

 a celebrated metallurgist, is engaged with the second edition of his classi- 

 cal Metallurgy of Iron. The first edition appeared in two volumes in the 

 1816, and was translated in the year 1824, by Captain Culman, into the 

 French language. The new edition will be comprised in four volumes 

 with sixteen copper-plates. The first volume, embracing the physical and 

 chemical properties of iron, is already published. An English translation 

 of this very useful work will be prepared in Germany. 



16. Iodine in Cadmium. — Iodine is found in the great zinc foundry at 

 Konigshutte, in Upper Silesia, in the kadmium which accompanies the 

 zinc-ores. 



17. Analysis of the Green Iron-ore. According to Dr Karsten, {Archiv 

 fur Bergbau und Huitenwesen, vol. xv. p. 241) a variety from the Hol- 

 lerter mines near Siegen in Rhein-Prussia consists of 



Oxide of iron, 63.450 



Phosphoric acid, 27.717 



Water, 8.560 



99.727 



From this composition Dr Karsten deduced the formula 2 F + *P + 2^ 

 Aq. the proportions of oxide of iron, phosphoric acid, and water, being 

 as 62.5^ : 28.59 : 8.90. 



18. Analysis of the Arseniate of Lead. — According to Dr Karsten, (1. c. 

 255.) a variety from Herrhausen near Siegen, in Rhein-Prussia, consists 



of 



Oxide of lead, 69.97 



Muriatic acid, 0.81 



Arsenic acid, 29.22 



100. 

 The results of this analysis are not accordant with those obtained by Dr 

 Wohler. — Poggendorff's Annalen, vol. iv. p. 161. 



19. On the Detection of Antimony in Mixed Fluids. By Edward 

 Turner, M. D. (From the Edinburgh Medical and Surgical Jour- 

 nal.) — Havmg been recently engaged, along with Dr Christison, in ex- 

 amining some food supposed to contain tartar emetic, I was led to in- 

 quire into the comparative value of the tests recommended for detect- 

 ing that substance ; and as, on pursuing the investigation, I found reason 

 to distrust the method described in our best works on toxicology, and at 

 the same time succeeded in rendering it more secure, I am induced to be- 

 lieve that a short account of my experiments will not be unacceptable to 

 the public. 



