(21) is the most abundant gaseous element yet discovered, and is a component of air.
A (22) is a small wind instrument in which the notes are determined by valves or pistons which open communication into auxiliary bands of tubing, thus varying the length of the vibrating column.
An interest-bearing debt-certificate issued by a corporation, municipality, or government is called a (23).
The (24) is one of the hypothetical indivisible parts of which all matter is supposed to be formed.
(25) is the color seen when sunlight is almost completely absorbed.
(26) is the distance east or west on the earth's surface, measured by the angle which the meridian through a place makes with some standard meridian, as that of Greenwich.
(27) is the art of finding thoughts and giving them suitable expression.
(28) is the science that treats the development of material resources, or of the production, preservation, and distribution of wealth, and the means and methods of living well, for the state, the family, and the individual.
(29) is an amorphous white compound, isomerie with starch, insoluble in all ordinary solvents, forming the fundamental material of the structure of plants.
(30) is a system of remedial treatment in which it is sought to cure a disease by superinducing another of a different kind, or by producing a condition incompatible with the disease.
The power or efficient agent producing any thing or event is its (31).
(32) is that form of reasoning in which a fact, or the truth of a specific or individual statement, is inferred from a general fact, law or principle, given as a starting point, through the connecting relation of reasons and consequent.
The interval between two notes whose vibration frequencies are in the ratio 1-1 is called (33).
