mechanical mixture n.
A heterogeneous mixture of particles or masses distinguishable as such under the microscope or separable by filtration.
Chemically speaking, the crystal is always a perfect chemical body, and can never be a mechanical mixture.
A mechanical mixture is all that can be hoped for: nothing more is possible.
In our atmosphere we have a mechanical mixture of nitrogen and oxygen, four parts of nitrogen to one of oxygen.
In most other cases, however, the result is not a blend but a mechanical mixture.
It is so fundamentally unlike a mechanical mixture that even our imagination can give us no clew to it.
The gases are associated together, not as a chemical compound, but as a mechanical mixture.
What is the difference,” she asked, “between a chemical compound and a mechanical mixture?
Ordinary black gunpowder consists of a mechanical mixture of seventy-five per cent.
mechanical mixture is only the suspension of the parts of a solid in a fluid.
The air is a mechanical mixture, pointing to a special design and a special act of origin.