in Physics, the insensible loss or waste of the minute parts of any body, which fly off, and thus cause its diminution or consumption.

Circle of Dissipation, in Optics, the circular space upon the retina which is taken up by one of the extreme pencils of rays issuing from an object.

DISSOLUTION, in Physics, a discontinuation or analysis of the structure of a mixed body, by which what was once and contiguous is divided into parts, either homogeneous or heterogeneous. It is a general name for all reductions of concrete bodies into their smallest parts, without any regard either to solidity or fluidity.