A Phillipine spearhead.
Prehistoric British spearheads.
Prehistoric Irish spearheads, made of bronze.
23 pointed star
24 pointed star
Illustration of point of tangency (line and circle).
Illustration of radius drawn to point of contact of a tangent.
"Shows the head of a thyrsus composed of the leaves and berries of the ivy, and surrounded by acanthus…
Illustration to show if the bisector of the base angles of a triangle are drawn, and through their point…
Illustration to show the perpendiculars dropped from any point in the equilateral triangle to the three…
Illustration to show that the difference of the distances from any point in the base produced of an…
Theory of static equilibrium of mechanism, illustrated b Sir A.B.W. Kennedy.
Flat head screw countersunk (set flush) into wood.