SELF-HARDENING a.
ating, or pert. to, any of various steels that harden when heated to above a red heat and cooled in air, usually in a blast of cold air with moderate rapidity, without quenching. Such steels are alloys of iron and carbon with manganese, tungsten and manganese, chromium, molybdenum and manganese, etc. They are chiefly u…
SODIUM n.
rbonate, etc. -- Sodium carbonate, a white crystalline substance, Na2CO3.10H2O, having a cooling alkaline taste, found in the ashes of many plants, and produced artifically in large quantities from common salt. It is used in making soap, glass, paper, etc., and as alkaline agent in many chemical industries. Called als…
STRAWBERRY n.
s Cereus (C. triangularia). It has a sweetish flavor, and is slightly acid, pleasant, and cooling. Also, the plant bearing the fruit. -- Strawberry sawfly (Zoöl.), a small black sawfly (Emphytus maculatus) whose larva eats the leaves of the strawberry vine. -- Strawberry tomato. (Bot.) See Alkekengi. -- Strawberry t…