A system of old age pensions should be adopted by the United States government.  Robbins, p. 33:  Briefs and references.—­Thomas, p. 192:  Briefs.

=Oleomargarine.=

Each state has the right to prohibit the sale of oleomargarine within its limits.  Brookings, p. 149:  Briefs and references.

=Open shop and closed shop.=

Employers of labor are justified in insisting on the “open” shop. 
Thomas, p. 194:  Briefs.

The general welfare of the American people demands the open shop principle in our industries.  Speaker, v. 2, p. 398:  Report of speeches.—­C.  L. of P. Debates:  References.

In labor disputes workmen are justified in demanding as a condition of settlement that their employers agree to employ only members of trade unions.  Pearson, p. 261:  Speeches and references.

The movement of organized labor for the closed shop should receive the support of public opinion.  Debaters’ handbook ser., no. 16:  Briefs, references and selected articles.—­Wisconsin University, no. 395:  Arguments and references.

=Opium habit.= See =Drink and opium.=

=Opium trade.=

Suppression of the opium trade in the East.  Askew, 1906, p. 163:  Briefs and references.—­Askew, 1911, p. 166:  Briefs.

=Opportunities for success.= See =Success.=

=Optimism and pessimism.=

Is the world growing better?  Gibson, p. 242:  Briefs and references.

Is there more ground for the philosophy of optimism than for the philosophy of pessimism?  Matson, p. 443:  Briefs and references.

=Oratory.=

Is ancient oratory superior to modern?  Matson, p. 280:  Briefs and references.

Is modern equal to ancient oratory?  Rowton, p. 196:  Briefs and references.

Which does the most to make the orator, knowledge, nature or art?  Rowton, p. 169:  Speeches and references.

=Osborne judgment.=

Osborne judgment; should the law be altered?  Askew, 1911, p. 168: 
Briefs.

=Outdoor relief.=

Should outdoor relief be encouraged?  Askew, 1906, p. 165:  Briefs and references.—­Askew, 1911, p. 170:  Briefs.

Should we abolish outdoor relief?  Gibson, p. 144:  Briefs and references.

=Painting, Schools of.=

Impressionism in art versus the preraphaelite school.  C. L. of P.
Reference lists.

=Papacy.= See =Roman Catholic church.= Papacy.

=Paradise lost and Divine comedy.= See =Dante and Milton.=

=Parcels post.=

The federal government should establish a parcels post.  Debaters’ handbook ser., no. 12:  Briefs, references and selected articles.—­Thomas, p. 192:  Briefs.

The parcels post system advocated by Postmaster General George von L.
Meyer should be established.  Wisconsin University, no. 204: 

References.—­Wisconsin University, no. 458:  Rev. ed.  History, arguments, references.