( 2pd ) 
V. I prepared Nails of feveralSizes, from the fmall- 
efl Sort of Bellows-Nails to the largeft Sort of Rafter- 
Nails, one or two of each Sort, or more of the fmaller r 
I held each of them perpendicularly with its Point up- 
wards, and placing thereon the plain Side of a File 
horizontally, I filed off a little from the Point thereof ‘ 
(more or lefs according to the Size of the Nail, per- 
haps about the Thicknefs of a Six-pence from a Six* 
penny one). Then on a plain Hone, held horizontally, . 
I placed the Nail upright, with its Point downward, 
and fo rubbed off the Strokes of the File. Then 5' 
rubbed it a little on a Piece of Leather. Note^ The 
truer this little narrow Plain is, and more exadly per* 
pendicular to the Nail’s Axle,, the better; 
VI. I prepared Iron Bars of different Lengths after 
the following Manner : I made each End in the Shape 
of the lower Fruflum of a Pyramid, cut tranfverfe toits- 
Axis about the Middle,, or a little higher up. Then 
I tiled the Ends of the Bar as plain and perpendicular 
to its Axis as I could, and polifhed them with a Hone, . 
^c. as I did the Nails. See the Figure. 
VII. One of the Needles I ufed untouched, for try- 
ing Experiments, was made thus: I took fome Iron 
Wire, about the Size of a fmall Knitting-Needle, and 
in Length abouttwo Inches and a half. With aHam- 
mer I made it juft flat enough in the Middle, to be able 
to fix the Point of a Punch pointed, to as true a Cone 
as I could • its Sides (as I guefs) made an Angle with 
each other at the Vertex of about 45: Gr. or more ; in 
the Middle of the Wire I punched a Hole at leafi: 
half 
