Nitrogen gas, on the contrary, while alone, will not support either respiration or combustion; mixed, however, with oxygen, it dilutes it, and in the most happy manner fits it for reception into the lungs.]

WILSON, PERRY W. The biochemistry of symbiotic nitrogen fixation.

We have traced slightly in outline the formation of saltpetre to the action of ozonized oxygen on nitrogen compounds, in the atmosphere, or in the earth,the conditions being the same in both cases.

Refrigerator N. refrigerator, refrigeratory^; frigidarium^; cold storage, cold room, cold laboratory; icehouse, icepail, icebag, icebox; cooler, damper, polyurethane cooler; wine cooler. freezer, deep freeze, dry ice freezer, liquid nitrogen freezer, refigerator-freezer.

In the organic world plants represent the carbon pole, animals the nitrogen pole; the former is the north pole, the latter the south.