2 Words to use with emissions

In England the Unitarians have now about 314 chapels and emission stations; in Scotland there are only five congregations recognising Unitarianism; in Ireland about 40; in our colonies there are a few; in the United States of America the body has 256 societies; in France, Germany, Holland, &c., the principles of Unitarianism are pretty extensively believed in.

But the small minority has already prevailed: the emission theory has gone out; the undulatory or wave theory, after some fluctuation, has reached high tide, and is now the pervading, the fully established system.

2 Words to use with  emissions