In contrast, the tumors of the hard palate have much more varied histology with non-squamous cell tumors, including minor salivary gland tumors, causing a greater portion of the tumors seen in the hard palate, as well as rare cases of melanoma, sarcoma and malignant lymphomas.
Based on ANSI X4.13, the LUHN formula (also known as the modulus 10 -- or mod 10 -- algorithm) is used to generate and/or validate and verify the accuracy of credit-card numbers. 1  Tweet.
Nightjohn is a story that is set in the south during the time of slavery. Based on an actual incident, Gary Paulsen tells about a young slave girl, Sarny, who it taught to read by another slave, Nightjohn. The book is very well written, complete with dialect that makes the book even more interesting to read. Nightjohn has escaped to the North where he was taught to read, but he keeps coming back to the south to further educate the slaves of the plantations.