A more thorough explanation:

Tract: A specific piece of land, usually measured in acres or square feet.

Tract Index: A list or database that provides information about tracts of land, such as their location, size, and ownership.

Tractus Futuri Temporis: A Latin term used in history to refer to a hypothetical or imagined period of time in the future.

Example 1: The farmer purchased a 50-acre tract of land to expand his farm.

Example 2: The real estate agent used the tract index to find available properties for her clients.

Example 3: In his book, the author wrote about a tractus futuri temporis where humans had colonized Mars.

These examples illustrate how the term "tract" can be used to refer to a specific piece of land, a tool for finding information about land, or a hypothetical period of time in the future.