204 



Miscellaneous Intelligence, 



Quantities ])er 1 . 00000 parts of 



Carbon. Silicium. 

 Welchgreyl Q (J2450 0.01620 



Do. 0.02550 



Do. 0.01666 



rranche | 0.02800 

 Comte do. J 

 Creusotdo. 0.02021 



ChampagnelQ Q2100 

 do. j 



Berry do. 0.02319 



Nivemaisdo. 0.02254 



Champagne I QQ2324 0.00840 0.00703 

 ■white pig J 



Iseredo. 0.02636 



German do.) Q 02690 

 (Siegen) J 



Do.(Cob- I 0.02441 0.00230 0.00185 



Phosphorus. Manganese. Iron. 

 0.00780 traces 0.95150 



0.01200 

 0.03000 



0.01160 



0.03490 



0.01060 



0.01920 

 0.01030 



0.00260 

 0.00230 



0.00440 

 0.00492 



0.00351 



0.00604 



0.00869 



0.00188 

 0.01043 



0.00280 

 0.00162 



lentz) 



3? 



0.02137 

 0.02590 



0.02490 



0.95310 

 0.94842 



0.95689 



0.93385 



0.95971 



0.95573 

 0.95673 



0.96133 



0.94687 



0.94338 



0.94654 



Obtained by 



coke. 



coke, 

 coke. 



coke. 



coke. 



coke. 



wood & coke, 

 charcoal. 



wood. 



wood. 



wood. 



wood. 



Table of the Composition of certain Irons of Commerce, 



Manganese, 

 traces, 

 traces, 

 traces. 



Swedish, best quality 



Do. 

 Creusot iron 

 Champagne do. 

 Scrap iron of Paris 

 Berry iron 

 Brittle Moselle iron 



Carbon. 

 0.00293 

 0.00240 

 0.00159 

 0.00193 

 0.00245 

 0.00162 

 0.00144 



Silicium. 



traces 

 0.00025 



traces 



0.00015 



0.00020 



traces 

 0.00070 



Phosphorus. 

 0.00077 



traces 

 0.00412 

 0.00210 

 0.00160 

 0.00177 

 0.00510 



traces, 

 traces, 

 traces, 

 traces. 



Table of the Composition of certain kinds of Steel. 



Best fused English steel 

 Fused steel of Isere 



Do. 1st quality 



Do. 2nd quality 



Carbon. Silicium. Manganese. Made of. 



0.00625 0.00030 traces Swedish iron. 

 0.00651 traces traces Isere iron. 



0.00654 0.00040 traces French iron. 

 0.00936 0.00080 traces French iron. 

 —Bull Univ. F. xiii. p. 238. 



9. On Artificial Crystals of Oxide of Iron. — M. Mitscherlich has 

 examined certain crystals of oxide of iron, found in a pottery fur- 

 nace at Oranienbourg. These were in very obtuse rhomboids, 

 and resembled the specular iron of volcanoes, having the same 

 brilliancy, hardness, scratch, and other properties. The smaller 

 crystals, composing extremely thin plates, were transparent and 

 red, like micaceous iron. The foces were brilliant, the angles 

 could be measured, and were the same with those of the natural 

 crystal. So greatly do these resemble the crystals of volcanoes, 

 that the same theory of formation may be applied to both. The 

 first are formed in a pottery furnace, in which the vessels, when 

 baked, are glazed by means of common salt. The clay used 

 consists principally of silica, alumina, and a little oxide of iron. 

 The salt is volatilized, and with water coming in contact with 

 the surface of the vessels, new compounds are produced, water is 



