This section is from the book "Spons' Mechanics' Own Book: A Manual For Handicraftsmen And Amateurs", by Edward Spon. Also available from Amazon: Spons' Mechanics' Own Book.
This is simplicity itself. The top or seat proper consists of a circular slab of wood 1 1/2 in. thick having 3 1-in. holes bored through it at equidistant intervals about l 1/2 in. from the edge. Into these holes are driven the stout rods forming the legs, the holes having been bored somewhat sloping so that the legs may diverge outwards to give solidity. When the legs are driven in quite tight, the portion which projects above the seat is sawn off, and a wooden wedge is driven firmly into a slit cut in the top of each leg by means of a chisel. If the legs are less than 1 ft. high, no rails will be needed; but if more, they should be strengthened by joining them together with 1/2-in. wooden rods let into holes bored in the legs at about 1/3 the height of the seat from the ground, and secured by glue.