The surface finish for Rockwell testing must be smooth and uniform to obtain an accurate measurement. If you recognize the fact that one Rockwell point is equal to 0.002 millimeter (0.000080 inch), it is easy to understand why certain aspects of the test are important. Rockwell results typically are reported to 0.1 Rockwell point (0.000040 in.).
Pinworm inhabits the colon and rectum, feeding on Escherichia coli (E. coli) bacteria in the stool. Late at night when children are asleep, the female pinworm, which measures about the length of a staple (0.5 inch or 13 millimeters), emerges from the anus and lays her eggs on the surrounding skin.
Dogs (and cats) are victims of several intestinal parasites frequently referred to as worms. The most common are the roundworms, hookworms, whipworms and tapeworms. Of these four only two are commonly seen in the stool with the unaided eye: roundworms and tapeworms. Often you will be able to tell if your dog or cat has worms by the symptoms they are exhibiting. Most worm infestations cause any or all of these symptoms: Diarrhea, perhaps with blood. Weight loss. Dry hair. General poor appearance. Vomiting, perhaps with worms in the vomit.