What was the lowest measure number? 
CREATE TABLE "may_1974_election" (
  "meas_num" real,
  "passed" text,
  "yes_votes" real,
  "no_votes" real,
  "pct_yes" text,
  "const_amd" text,
  "type" text,
  "description" text
);
SELECT MIN("meas_num") FROM "may_1974_election";