Calesce

Now [warming it over the spirit lamp] here it is becoming yellow again, and that is all because its attraction of cohesion is changed. And what will you say to me when I tell you that this piece of common charcoal is just the same thing, only differently calesced, as the diamonds which you wear?

23. Drops of Water. — In answer to E. J. Pond's query in Science for Jan. 20, it seems to me that the phenomenon is explainable in the same way as the related phenomenon of drops of water on a hot stove; […] The small drops that fall from the oar-blade will float a short time before calescing, even when no wind is blowing; […]