MINERALOGICAL IMPLEMENTS. 409 



stone cutter's hammer, having a 

 slightly rounded face, and at 

 the opposite end, an edge hav- 

 ing the same direction as the 

 handle. The handle should be 

 made of the best hickory, and the mortice to receive it 

 should be as large as the handle. A similar hammer, having 

 the upper. part prolonged to a blunt point, to be used like a pick. 



17. Another hammer of half a pound weight, similar to 

 the preceding, except that the face should be flat ; to be used 

 in trimming specimens. 



18. A small jeweller's hammer, for trying the malleabili- 

 ty of globules obtained by the blowpipe, and for other pur- 

 poses. 



19. A piece of steel, say £ inch thick, 1 or 2 wide, and 2 

 or 3 long, to be used as an anvil. A fragment may be broken 

 or pulverized upon it, by first folding it in a piece of thin pa- 

 per, to prevent its flying off* when struck. A half inch cir- 

 cular cavity on one side, and a pestle to correspond, will be 

 found veiy convenient. 



20. Two steel chisels of the form of a wedge, as in the 

 annexed figure ; one 6 inches long, and the other 3. When 

 it is desired to pry open seams in rocks with the larger jF^ 

 chisel, two pieces of steel plate should be provided to | I 

 place on opposite sides of the chisel, after an opening I / 

 is obtained ; this protects the chisel and diminishes \ I 

 friction while driving it. V 



21. Bone ashes, to be used upon mica, or in a small cav- 

 ity in charcoal, in cupelling for silver, with the blowpipe. 

 A rounded cavity should be made in the charcoal, as large 

 as the end of the little finger, and the bone ashes (slightly 

 moistened, and mixed with a little soda,) should be pressed 

 into it firmly with the head of a small pestle , after tho 

 roughly drying, it is in a condition to receive the assay. 



22. A pocket microscope. 



23. A small agate mortar and pestle. 



24. A magnetic needle. 



25. A pair of scissors. 



26. A box of matches. 



For blasting and other heavy work, the following tools 

 End appliances are necessary : — 



1. Three hand-drills, 18, 24, and 36 inches long, an inch 

 in diameter. The best form is a square bar of s'.eel, with 

 a diagonal edge at one end. The three are designed to fol- 

 .ovv one another. 



