Question: Name the candidates for Pennsylvania 14
SQL: SELECT "Candidates" FROM "1-2668347-17" WHERE "District" = 'Pennsylvania 14';

Question: Name the incumbent for Jacob Spangler (DR) 67.1% Jacob Hay (F) 32.9%
SQL: SELECT "Incumbent" FROM "1-2668347-17" WHERE "Candidates" = 'Jacob Spangler (DR) 67.1% Jacob Hay (F) 32.9%';

Question: Name the number of candidates for  Samuel D. Ingham
SQL: SELECT COUNT("Candidates") FROM "1-2668347-17" WHERE "Incumbent" = 'Samuel D. Ingham';