This census was taken 23 July - 27 July 1860, but all information was to be as of June 1st, 1860. Want / need to know more about the 1860 census? Go here
Columns are:
Dwelling number = In the order visited
Name = the name of every free person in each family, of every age, including the names of those temporarily absent on a journey, visit, or for the purposes of education, as well as those that were at home on that day. The name of any member of a family who may have died since the lst day of June is to be entered and the person described as if living, but the name of any person born since the lst day of June is to be omitted.
Age = Age on June 1st, 1860
Place of Birth = Name of state this individual was born in