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