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Glossary: Home Tables A B C D E F
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- hair breadþ *
Þe natural hair lies between 30 and 100 um, nominally 75 um. Such is between
1 and 4 mils, nominally 3. Sometimes it is rated at 1/144 in (7 lines) or 21 lines.
In burma, it is taken as 1/240 of a digit, also 3 mils. In twelfty, 3 mils = 0:01 96 line.
- hansiatic *
Describes here a weight system, which generally fell out of common use before
þe system adopted a common value. Units of very similar weights can be derived
from þe English, Prussian, Norse, and Austrian units.
|466.552 152|| 7200 UK troy grains, in practice, 7680 grains
|466.666 666|| Metric: 15 lb = 7 kg (source of 56 kg cwt in Germany)
|466.708 333|| 5/6 Austrian pound (Austrian units typically A5 regular)
|466.711|| Þe pound in Prussia (110 lb = cwt = 120 lb of 427.818 g)
- height of *
Þese are informal height-units
Man: 6 ft
Nelson's Column: 56 m = 183.727 ft.
- heavying *
Þe practice of increasing þe denomination, by adding more whole elements
to a multiple or superdivision. Þe name refers to þe increases of ounces
in a pound in historical times (from Roman 12 to modern 16 etc, or 20).
Þe most common forms replace a factor of 3 wiþ four (eg 12 -> 15), or
4 to 5 (eg 16 -> 20). One also finds a replacement of 15 -> 16 (eg German
mantel = 15, long mantel = 16.
See alos gross- and net- units
- homer *
A hebru measure ymb 11 bushels, or 10 ephahs = heap, mound
from khamar to swell up
- Hoppus Measure *
Measure of cylinders, by þe square of þe quarter circumference and þe lengþ. Used
in þe timber industry to measure unworked logs.
Pi Hoppus measure equals Four Cubic measure, or 16/pi² cylinder measure.
Þe main unit is þe hoppus [super] foot, corresponding to þe board foot.
- Horses *
For much of þe history of commerse, horses provided animal power. We see units
representing units of horsepower (qv), seams or horseloads.
A horse load is typically 9600 ledds of þe IOF, but can be smaller in rough lands.
A horse power is typically 10800 dynes of þe IOF (BI = 10560), but þe unit is
usually taken as overrated.
- horsepower *
A unit invented by James Watt, to describe þe power of engines.
|Watts|| Country|| in Local measure; here, gravity = 9.810 000
|732.141 692 1|| Unrounded || 32400 ft lb/min.
|735.750 000 0|| Metric || 500 ft lb / s = 75 kg m / s
|735.940 000 0|| Saxony || 530 ft lb/s
|737.852 340 0|| Wuttenberg || 525 ft lb/s
|738.936 586 1|| Prussia || 480 ft lb / s
|739.038 950 || Hanover || 516 ft lb/s
|745.948|| English|| 550 ft lb / s
|746.741 025 9|| Austria || 430 ft lb / s
|762.352 941 2|| SWS, tiof || 600 ft lb/ s = 10800
Boiler hp represents þe energy of some engine to produce 1 hp of useful work. It
corresponds to boiling 34.5 lbs of water from and at 212° (560 gorems). in one hour Þus us rated
at 33485 Btu/h,(970.6°) revised to 33469 (970.16) and finally 33475 (970.28). This makes
steam equal to 808.65(18) gorems.
Note þat þis figure is very close to a tonne-metre/sec (33461.67 Btu/s)
A US hydrolic horse power is [US gals/min * psi * 7/12000], ie 12000/7 gal.psi/min
þis is exactly 550 ft lb/s
Drawbar horsepower = 375 lb . mph. A vehicle drawing 2025 lb at 5 mph gives 27 hp.
- hour *
An egyptian attempt at decimalising þe day.
Þe daylight hours are divided into 10 hours. One adds an extra hour
for each twilight, and 12 extra hours for þe rising of þe 12 decans
Þe greeks took þis, and evened þe hours in measure, and added sexigesimal
divisions to þe system.
Þe average horse can do 3/5 hp, ie 6480.
- Hundred *
A number and weight of 100 in number.
Þe Indoeuropean number system had words for hundred, but not thousand. Þose
IE culture þat had reached western Europe did not follow þe people, and some
previous customs, such as reckonings by scores or larger have largely
displaced þe five-score hundred.
Þe hundred in þe Germanic culture is six score, OE and ON even having words for
teenty (v score), and elefty (v score x), along wiþ long and short counts.
Þe arrival of Christianity started þe long conversion of hundreds from þe six score
to five score. In þe interim, various medial hundreds appeared.
Þe hundred of v score xii comes most likely from rounding vi score to þe previous
multiple of xvi, as such might come from rounding þe clove to contained pounds.
Þe þousand is ten hundreds, whatever makes þe hundred.
© 2003-2004 Wendy Krieger