12 E. J. CHAPMAN ON SOME 



P 0.12, S O.Oto, Insoluble rock-matter 10.420. (" Descriptive Catalogue of the Ecouomic 

 Minerals of Canada," 1876). 



No. 14. Sample from " Ledge 2 " of the Seymour Mine. Magnetic ore, with slightly 

 greenish-tinge. Metallic iron 62.54 per cent. 



No. 15. A dark, fine-grained magnetic ore, from the DvifFerin Mine, lot 18, concession 

 1, township of Madoc, extending into lot 18, concession 11, township of Marmora. This 

 deposit is apparently an ore-stock of very irregular form. An open cutting to a depth of 

 about 30 feet has been carried down upon it, and a good deal of very excellent ore has 

 been taken out, but no systematic mining, has hitherto been attempted. The sample 

 showed 68.90 per cent, metal, with rock-matter under 5 per cent, and no trace of titanium. 

 Another, but smaller, sample, taken from the bottom of the excavation, held only 3.68 per 

 cent, siliceous rock-matter. 



No. 16. Magnetic ore from a very large deposit on lots 15 and 16, concession 8, town- 

 ship of Wollaston. The sample, subjected to analysis, consisted of surface specimens, 

 slightly peroxidized. The deposit, under the name of the Coe Hill Mine has since been 

 opened, and is now largely worked. On descending, a few pyritous streaks have been 

 encountered, and here and there the ore is mixed with a somewhat larger amount of rock- 

 matter, but this is pyroxenic, and hence comparatively self-fluxing, tliroughoiit the entire 

 mass of the deposit. The average amount of iron is from 60 to Qô per cent. Titanium is 

 entirely absent. 



No. 1'7. A magnetic ore of high grade, from a A^ery large deposit on lots 6, V and 8, 

 concession 19, township of Tudor. The exposed ore rises in a series of ledges from the level 

 of the ground to a height of from 150 to 180 feet, and extends over a space of at least 1000 

 feet in length by 100 feet in breadth. It is thus, in all probability, an enormous mass or 

 " stock," the portion above ground alone including many thousand tons of ore. The ore, 

 itself, is comparatively soft, and of a fine-granular, more or less porous, texture. The 

 analysis shows 03.30 per cent, metal, with total absence of titanium, and traces only of 

 phosphorus and sulphur. It is one of the finest ores in this section of Ontario. The inter- 

 mixed rock-matter (8.36 per cent, in my samples) yielded : silica 5.22, lime 1.93, magnesia, 

 etc., (by difference) 1.21. The deposit is known as the Emily Mine. 



No. 18. A very superior magnetic ore from lot 18, concession 18, township of Tudor. 

 The ore is exposed in the form of a broken curve or semicircle along the eastern face of a 

 somewhat abrupt ridge or slope, over a length of about 1,200 feet, but it can be traced 

 much beyond that distance. About 500 feet to the south of this exposure a large mass of 

 similar ore, probably an extension of the main body, comes to the surface. Here and there 

 a few specks and thin strings of pyrites are visible, but the ore on the whole is of more 

 than average quality. In the sample taken for analysis the amount of metallic iron 

 equalled 68" 16 per cent. In other samples, subsequently examined, it averaged 66 percent.' 



' A recently published analysis of this ore, said to have been made in Fittsburg, i^uts the amount of metallic 

 iron at only 01504 per cent., with S'1.30 silica, O'COO phosphorus, and 050 sulphur ; but this can scarcely be correct, 

 as 01-504 iron corresponds to 85 'Oô magnetic oxide, and that amount, added to the other components, brings up the 

 total to 93.290, thus showing a loss in the analysis of 0-70 per cent. It should also be pointed out that the insoluble 

 rock-matter is not silica, as stated in the Pittsburg analysis, but essentially pyroxene. Free silica is in many 

 respects an objectionable substance in an iron-ore; whereas the presence of a calcareo-magnesian silicate, such as 

 pyroxene, is of far less moment. 



