MINEKALOGICAL 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 Jt 

 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 t 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 very 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 

 chisel, two pieces of steel plate should be provided to 

 place on opposite sides of the chisel, after an opening 

 is obtained ; this protects the chisel and diminishes 

 friction while driving it. 



> 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 steel, with 

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

 »ow one another. 



