Car 636 was part of an order for 25 streetcars for the Dallas Railway Co. from the J. G. Brill Company. Petunia, a "Birney Safety Car," (or Birney, for short) is named after its designer, Charles O. Birney of the Stone & Webster Co. The design incorporated numerous operational and safety improvements over earlier streetcars that permitted one man operation and thereby allowed street railway companies to reduce their expenses. Birneys were known for their bouncy riding qualities and were never very popular with the Dallas riding public. Nevertheless, 636 ran in Dallas until 1947 when it was replaced by more modern equipment. MATA's Ed and John Landrum, Frank Schultz and Dean Smith designed and built 636's current 8-foot-long truck using parts from the extra Melbourne trucks purchased along with Car 369. MATA later added shock absorbers to smooth out the Birney's characteristic bouncy ride.
