94 Introduction to Tables. 
_ not affected at all, and tenth, Specific Gravity (G) ; this 
may become necessary in order to render the compari- 
son decisive. 
Having formed some idea of the group to which the 
of physical properties, and turn to the Tables, and 
specimen belongs, and completed the foregoing tests; 
take the slip of paper containing the written summary 
search (under those groups to which the mineral is 
thought to belong) for a description which will nearest 
compare with that of the specimen. 
If the evidence found in the table is sufficient to 
identify the specimen, call it by the name given to that 
mineral appearing in the first left hand column opposite 
its description. 
All questions of doubt arising from approximate 
determination of mineral species by the tables should be 
settled by means of the blowpipe, or by some other relia- 
ble method of chemical analysis. *(See Qualitative Tests, 
pages 54-81.) 
