A very interesting result is that found in oxygen: the magnetic susceptibility of this body increases at the moment of liquefaction.
Nevertheless, this increase, which is enormous (since the susceptibility becomes sixteen hundred times greater than it was at first), if we take it in connection with equal volumes, is much less considerable if taken in equal masses.

It must be concluded from this fact that the magnetic properties apparently do not belong to the molecules themselves, but depend on their state of aggregation.
The mechanical properties of bodies also undergo important modifications.

In general, their cohesion is greatly increased, and the dilatation produced by slight changes of temperature is considerable.

Sir James Dewar has effected careful measurements of the dilatation of certain bodies at low temperatures: for example, of ice.
Changes in colour occur, and vermilion and iodide of mercury pass into pale orange.

Phosphorescence becomes more intense, and most bodies of complex structure--milk, eggs, feathers, cotton, and flowers--become phosphorescent.