In Thomas Walker's harpoon or frictionless log, introduced in 1861, the wheelwork was enclosed in a cylindrical case of the same diameter as the body of the rotator or fan, and the latter was brought close up to the register, forming a compact machine and avoiding the use of the 6-ft.
- The AI Harpoon Ship Log.
It is taken with the harpoon and its oil is one of the commercial products of the Amazon valley.
Some nomes having a common badge but distinguished as nearer or further, i.e northern or southern, have simply been split, as they are contiguous: in one case, however, corresponding eastern and western Harpoon nomes are widely separated on opposite sides of the Delta.
The harpoon for fishing was at first of bone (75), and was imitated in copper (76, 77) from S.D.
Sharks are caught in enormous numbers with hook and harpoon; the flesh is considered by some to have aphrodisiacal properties; the dried fins and tails are exported to China; the oil is used for smearing boats.