What is "patent outsides"

Inside \In"side`\, n.

1. The part within; interior or internal portion; content.

   Looked he o' the inside of the paper?
   --Shak.

2. pl. The inward parts; entrails; bowels; hence, that which is within; private thoughts and feelings.

   Here's none but friends; we may speak Our insides freely.
   --Massinger.

3. An inside passenger of a coach or carriage, as distinguished from one upon the outside. [Colloq. Eng.]

   So down thy hill, romantic Ashbourne, glides The Derby dilly, carrying three insides.
   --Anti-Jacobin.

   Patent insides or Patent outsides, a name give to newspaper sheets printed on one side with general and miscellaneous matter, and furnished wholesale to offices of small newspapers, where the blank pages are filled up with recent and local news.