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of fuch bodies as may be collected. A hammer 1 

 alfo may be neceflfary to break ftones, &c. that 

 are too bulky to bring away. 



A blow-pipe is likewife an ufeful article ; by 

 blowing long and forcibly through fuch an in- 

 ftrument, upon the flame of a candle, by which 

 the point of the flame may be directed againft the 

 body to be examined, it will frequently difcover 

 whether it is a calcareous, vitrifiable, or refrac* 

 tory fubftance and for greater preciflon, expe- 

 riments for the fame end may be afterwards made 

 at the fire-fide, on a charcoal fire, &c. 



The collector fliould alfo attend to as many of 

 the following particulars as poflible. 



1. When any article is collected, mark it by a 

 number, or fome fign of diftinction, referring to 

 a catalogue, with all the particulars that may be 

 known relative to it ; as, 



2. Where it was found. 



3. In what quantity, whether fcarce or abun- 

 dant. 



4. If on the furface of the earth, or at what 

 depth. 



5. In what pofition, whether horizontal, per- 

 pendicular, &c. And with what other foflil 

 bodies it was found, as clay, ftone, flate, 

 mineral, &c. 



6. Whether in ftrata, or in loofe nodules. 



7. The depth and thicknefs of the ftrata, how 

 they incline, or to what points of the compafs 

 they tend ; or if level or horizontal ; whether 

 they have perpendicular or horizontal fiflures, 

 and what foflil bodies are contained in thefe 

 fiflures. 



8. All high mountains and hills, efpecially 

 their fides, are to be fearched j the fliores alfo of 



the 



