Overlap problems in counting fibers.
The probabilities of certain errors in counting fibers due to accidental overlaying during sampling are calculated and shown to be significant. Justification is given for simple rules to get agreement in counting between microscopists.
D000397:Air Pollution / Q000032:analysis*; D005374:Filtration; D008433:Mathematics; D008722:Methods; D008853:Microscopy; D010316:Particle Size; D013223:Statistics as Topic