Den,

Regarding your comment of September 30th @ 9:13 a.m. about my comment of September 29th @ 8:41 p.m.

‘’I don’t understand what 1 fluid jerrican being 5 1/4 fl.gal. and not 5 fl.gal. has got to do with it. 2520 is the smallest number divisible by all numbers up to 10. There is no smaller number divisible by all the numbers from 1 to either 9 or 10. It is also the largest number with at least as many divisors as any number less than twice as much. It seems obvious that it would be more sensible if the 1 fluid tun was 2520 fluid gallons, not 252.0 fluid gallons.’’

Den, you may be right, but 1 fl. tun is still:

252.000000000 fl.gal.

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Info @

http://www.weights-and-measures.com

And topics:

old Avoirdupois Weight
Common Fluid Measure & Common Dry Measure



1 fl. tun = 33.600 cu.’
1 dry pt. = 33.600 cu.’’

252 fl.gal. = 33.600 cu.’
126 fl.gal. = 16.800 cu.’
84 fl.gal. = 11.200 cu.’
63 fl.gal. = 8.400 cu.’’
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42 fl.gal. = 5.600 cu.’
36 fl.gal. = 4.800 cu.’
31 1/2 fl.gal. = 4.200 cu.’
28 fl.gal. = 6451.200 cu.’’

216 dry gal. = 33.600 cu.’
108 dry gal. = 16.800 cu.’
72 dry gal. = 11.200 cu.’
54 dry gal. = 8.400 cu.’
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36 dry gal. = 5.600 cu.’
30 6/7 dry gal. = 4.800 cu.’
27 dry gal. = 4.200 cu.’
24 dry gal. = 6451.200 cu.’’

As pointed out repeatedly,
1 US gallon = 231.000 in^3, not 230.400 in^3 which is the basis of all your gibberish about fluid measure and wrong in the entirety.

also, 1 US bushel = 2150.420 in^3, not 2150.400 in^3, so that dry measure is all wrong too.

Perhaps you should toss your ancestor's book and download NIST Handbook 44, Appendix C (or SP 811)

<<Den, you may be right, but 1 fl. tun is still:

252.000000000 fl.gal.
. . .
252 fl.gal. = 33.600 cu.’
>>

Since this is all about the tun, assuming it is 252 US gallons
the correct answer is 33.6875 ft^3

(In UK, it may be 210 Imperial gallons, a slightly different amount)

Better yet, XCOLE should visit http://www.bipm.fr/en/si/ for up-to-date information on modern measurement units. But again, some people fear truth and logic.

Handbook 44, Appendix C covers both US Customary and SI, as used for trade in the US. SP811 is a metric style guide (required for NIST authors, optional but excellent guide for anyone else), with an extensive table of conversions at the back.

While at NIST, he could also download SP330 which is the US version (official US interpretation) of the BIPM SI brochure. All variations from the BIPM (English) brochure are fully annotated, but it includes US spelling and style in the main text: meter, liter (symbol L), deka-, metric ton, and decimal point(.).

All are free downloads in pdf. An excellent set of resources for anyone pro-metric, but even useful for someone who is pro-Imperial but still has to deal with SI.