TALLASITE. — CUMBERLANDITE. 83 



plnir, chromium, manganese, lime, and aluminum have been found in part of 

 the specimens analyzed. More and accurate analyses are needed before any- 

 thing but general conjectural statements can be made. If the analyses of 

 iron ores from regions of crystalline rocks be examined, like those given by 

 Richard Akerman in his work " On the State of the Iron Manufacture in 

 Sweden," Stockholm, 1876, also from Canada and elsewhere, many can be 

 found whose resemblance to those of Cumberlandite is so close as to warrant 

 an examination of the structure and mode of occurrence of the ore analyzed. 

 In these we should look for from 5 to 30 per cent of silica and magnesia, but 

 not of necessity for any titanium. The mere analysis, without further evi- 

 dence, does not prove the relationship — it merely suggests it. 



