▁pl ung er ▁p umps . ▁The ▁steam ▁cyl ind ers ▁were ▁ 1 1 ▁inches ▁and ▁ 2 2 ▁inches ▁in ▁diameter , ▁the ▁p ump ▁pl ung ers ▁ 1 2 ▁inches ▁in ▁diameter , ▁and ▁both ▁p ist ons ▁and ▁pl ung ers ▁have ▁a ▁stroke ▁of ▁ 1 8 ▁inches . ▁When ▁operated ▁at ▁the ▁rate ▁of ▁ 3 1 ▁revolution s ▁per ▁minute ▁the ▁capacity ▁was ▁ 1 , 5 0 0 , 0 0 0 ▁gall ons ▁per ▁day . ▁There ▁were ▁two ▁bo ilers ▁of ▁the ▁horizontal , ▁under - f ired ▁type , ▁each ▁ 5 4 ▁inches ▁in ▁diameter , ▁containing ▁ 6 0 ▁ 3 - inch ▁tub es ▁ ▁long . ▁The ▁furn aces ▁were ▁fitted ▁with ▁F oster ▁sh aking ▁gr ates , ▁ ▁wide ▁by ▁ 5 ▁l / 2 ▁feet ▁long . ▁ ▁See ▁also ▁Myst ic ▁Water ▁Works , ▁a ▁p ump ing ▁station ▁in ▁Som er ville ▁National ▁Register ▁of ▁Historic ▁Places ▁list ings ▁in ▁Ar ling ton , ▁Massachusetts ▁ ▁References ▁▁ ▁Massachusetts ▁Metropolitan ▁Water ▁and ▁Se wer age ▁Board , ▁Se vent h ▁Ann ual ▁Report ▁of ▁the ▁Metropolitan ▁Water ▁and ▁Se wer age ▁Board , ▁For ▁the ▁Year ▁ 1 9 0 7 , ▁Volume ▁ 2 , ▁Boston , ▁ 1 9 0 8 , ▁pages ▁ 9 7 – 9 9 . ▁ ▁Category : Build ings ▁and ▁structures ▁in ▁Ar ling ton , ▁Massachusetts ▁Category : Ind ust rial ▁buildings ▁and