[Issued in loose-leaf form for use of the service. This chapter has also been issued for sale in pamphlet form with title, Instructions for treatment of boiler feed water and for operation and maintenance of feed-water apparatus, for which see above.]
Notes:
[Issued in loose-leaf form for use of the service. This chapter has also been issued for sale in pamphlet form with title, Instructions for treatment of boiler feed water and for operation and maintenance of feed-water apparatus, for which see above.] ‡ Official Use. Not Available.