46 JOURNAL OF THE 



washed out, when the yellow precipitate is dissolved with ammonia, 

 magnesium-ammonium phosphate may precipitate in the filter. I 

 found that four washings by decantation and three subsequent wash- 

 ings on the filter failed to accomplish the entire removal of the mag- 

 nesium chloride. Five washings by decantation and four washings 

 on the filter failed to effect this entirely completely in every case. 

 More washing than this, however, will remove the trouble, but at the 

 expense of much time. 

 Raleigh, N. 6'., April 6th, 1885. 



ANALYSIS OF SPIEGEL-EISEN. 



MAX. JACKSON. 



The specimen analyzed was one produced at the charcoal furnace 

 of the American Iron and Steel Company at the Buckhorn Locks. 

 The Buckhorn mining section lies in Chatham county, on the border 

 of Harnett, and a full description of the economical geol >gy of the 

 district is given in Kerr's Geology, vol. I, 222. A very superior car 

 wheel iron has been turned out by this company. The product is 

 mainly spiegel-eisen. Partial analysis have been made by Mr. Lob- 

 dell. 



In this analysis the directions in Cairns' Handbook were generally 

 followed. The carbon was determined by Weyl's method, no 

 attempt being made to distinguish between combined and uncom- 

 bined carbon. The iron and manganese were separated according 

 to the method described by Holthof (Zeit. f. Anal. Chem. 23.491). 

 Sulphur, copper, nickel, cobalt, calcium and barium were tested for 

 but none found. The figures in the analysis below are, in most 

 cases, the means of two or more accordant determinations. For 

 comparison, Lobdell's analysis are also tabulated under the II, III 

 and IV. 



I. II. III. IV. 



Iron 95 -03 -.-- 



Manganese 2.46 4-573 6.50 4.8S 



Silicon II .233 .14 .38 



Sulphur .015 .009 



Phosphorous 10 .051 .12 .095 



Carbon 2.35 



Titanium, trace. 



