The system of direct primary nominations is preferable to that of nomination by caucus and convention.  Debaters’ handbook ser., no. 5:  Briefs, references and selected articles.

=Primitive man.= See =Man.=

=Primitive religion.= See =Religion.=

=Primogeniture.=

Abolition of the law of primogeniture.  Askew, 1911, p. 186:  Briefs.

=Printing-press and steam-engine.=

Which has done the greater service to mankind, the printing press or the steam engine?  Rowton, p. 153:  Speeches and references.

=Prison labor.= See =Convict labor.=

=Prisons.=

Prison reform.  Askew, 1906, p. 184:  Briefs and references.—­Askew, 1911, p. 186:  Briefs.

Should our prisons be reformed?  Gibson, p. 150:  Briefs and references.

Should the chief purpose of a prison be to punish or to reform?  Matson, p. 162:  Briefs and references.

See also Indeterminate sentence.—­Punishment.

=Private property at sea.=

Private property at sea; should it be exempt from capture?  Askew, 1911, p. 187:  Briefs.

=Probation after death.=

Is the hypothesis of a probation after death rational and probable?  Does human probation terminate at death?  Matson, p. 494:  Briefs and references.

=Professionalism in foot-ball and in cricket.=

Askew, 1906, p. 185:  Briefs.

=Profit-sharing.=

Askew, 1906, p. 186:  Briefs and references.—­Askew, 1911, p. 191: 
Briefs.

Is profit-sharing the cure for labour-troubles?  Gibson, p. 153:  Briefs and references.

=Prohibition.= See =Liquor question.=

=Proportional representation.=

Askew, 1906, p. 186:  Briefs and references.—­Askew, 1911, p. 192: 
Briefs.

Legislative bodies should be chosen by a system of proportional representation.  Ringwalt, p. 59:  Briefs and references.

Members of the legislature of the state of Wisconsin should be chosen by a system of proportional representation.  Wisconsin University, no. 225:  References.

State legislatures should be elected by a system of proportional representation.  Thomas, p. 168:  Briefs and references.

=Protection and free trade.=

A high protective tariff raises wages.  Brookings, p. 99:  Briefs and references.

Imperial preferential tariffs.  Askew, 1906, p. 177:  Briefs and references.

Our legislation should be shaped toward the abandonment of the protective tariff.  Pearson, p. 111:  Synopsis of debate, and references.

Protection is preferable to free trade as a commercial policy for the United States.  Ringwalt, p. 95:  Briefs and references.

A protective tariff is a commercial and economic advantage to the United States.  Thomas, p. 172:  Briefs and references.

Shall we go back to protection?  Gibson, p. 261:  Briefs and references.