Verified

Burgh of Dunfermline Gas Undertaking
Meter Checking Room — Bell Prover Test Card

Prover No. 2: the counterweighted bell in its water seal, scribed marks two cubic feet apart. The lower mark is the one you set to.
Prover No. 2 — bell & seal
FORM 14 · REV. 3
TUES. 27 OCT. 1936
CHECKED WED. 11.32 A.M.
Serial No. Index
before		 Index
after		 Regd.
vol.		 Temp.
°F		 Bar.
in.		 Corr.
factor		 Corr.
vol.		 Error %Limit ±2·00

Correction — pencil only

Choose a figure on the card.
Slide rule — drag the slide, drag the cursor
Burgh
Gas
Undertaking
The stamp is not mine to use while the card is still wrong.

Working, line by line — Vc = Regd. vol × factor; factor = (bar ÷ 30·00) × (520 ÷ (460 + °F))

    SOUND: OFFCARDS CHECKED: 0 / FIGURES REWRITTEN: 0 / STAMPED: 0