1 List of United States cities by population. ^ 2  Population projection is that of the entity known since 2016 as Ciudad de MÃ©xico and previously as the Distrito Federal. ^  Population estimate is that of the Toronto census division, which consists solely of the City of Toronto.
Lens (optics) For other uses, see Lens. A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.
The obligation of any individual who, in the performance of the duties of his/her position, designation, or assignment, is required to assume custody or control over, and upon proper occasion, effect an accounting for government property committed to his/her charge by reason of this position, designation, or assignment.