A diagram of the "Plain Scale." The horizontal axis is labeled "inclinations of meridians" and vertical axis is labeled hours. Various geometric shapes and lines such as chord, rhombus, tangents, secants, semi tangents, longitudes, and latitudes are drawn within the "plain."
A letter from John Ball in Charleston, South Carolina to his son John Ball Jr. at Harvard College in Massachusetts discussing John's absence from school due to sickness, a gathering of people at the "May day frolic," a lawsuit between B.P. Williams and Uncle Coming's estate and Mrs. Edward's daughter Kitty dying. The letter goes on to discuss Aunt Waring's enslaved man Allick murdering Polly Smith's carpenter Tom resulting in the execution of Allick. Makes notation that Allick also confessed to trying to poison Aunt Waring five times and "is one of the strongest instances that has come under my knowledge of the impropriety of too much indulgence to slaves." The letter ends discussing how Aunt Waring had hanged one of her enslaved persons years ago for robbing a wagon.
A letter from John Ball in Newport, Rhode Island to his son John Ball Jr. at Harvard College in Massachusetts discussing money for John's schooling, and the poor health of Jane Ball sick with a boil on her head, fever and weakness.
A letter from John Ball at Kensington Plantation to his son John Ball Jr. at Harvard College in Massachusetts discussing John Ball Jr.'s poor health, education, and travel.
A letter from John Ball Sr. at Kensington Plantation to his son John Ball Jr. at Harvard College in Massachusetts discussing John's improved health, sending the enslaved man Nat to Boston assist John, the weather, and the rice crops.
A letter from John Ball Sr. in Charleston, South Carolina to his son John Ball Jr. at Harvard College in Massachusetts discussing travel, finances, the family's rice crop, Jane Ball's health, and sending the enslaved man Nat to Boston to assist John Ball Jr.
A letter from John Ball Sr. at Kensington Plantation to his son John Ball Jr. at Harvard College in Massachusetts discussing money, family matters, a comparison of education between England and America, morals and principles, and sending the enslaved man Nat to Boston to assist John Ball Jr.
