The ferrotype and how to make it - The Grian Press

ADDENDA.
WEIGHTS AND MEASURES.
Trmff or Apothecaries^ Weight.
I pound = 12 ounces ; 1 ounce = 8 drachms ; 1 drachm
— 3 scruples ; 1 scruple = 20 grains. (1 ounce Troy = 480
f rains, or 1 ounce Avoirdupois 52'5 -J- grains.)
Avoirdupois Weight.
1 pound = 16 ounces ; 1 ounce = 16 drachms ; 1 drachm
= 27'343 grains. (1 ounce Avoirdupois = 437*5 grains.
1 pound Avoirdupois = 7000 grains, or 1 pound Troy -|- 2i
Troy ouncss -f 40 grains.)
Imperial Measure.
1 gallon = 8 pints ; 1 pint = 20 ounces ; 1 ounce = 8
drachms ; 1 drachm = 60 minims. (A water-pint of water
measures 16 ounces, and weighs a pound.)
An Imperial gallon of water weighs 10 pounds Avoirdupois,
or 70,^00 grains. An Imperial pint of water weighs 1^ pound
Avoirdupois. A fluid ounce of water weighs 1 ounce Avoirdupois,
or 437*5 grains. A drachm of water weighs 54*7
grains.
French Meamires of Weight.
1 kilogrwmme = 1000 grammes = something less than 2
pounds Avoirdupois.
1 gramme = 10 decigrammes = 100 centigrammes= 1000
milligrammes = 15*433 English grains.
A gramme of water measures 17 English minims, nearly.
1000 grammes of water measure 35 J English fluid ounces.
French Measures of Volume,
1 litre = 10 decilitres = 100 centilitres = 1000 militres
= 35J English fluid ounces.
1 litre = 1 cubic d^cim^tre = 1000 cubic centimetres.
1 cabic centimetre ^= 17 English minims.
A litre of water weighs a kilogramme, or something less
than 2^ pounds Avoirdupois. A cubic centimetre of water
weighs a gramme.
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