The Dictionary Of Photography

A True Historic Record Of The Art & Practice Of Photography 100 Years Ago.

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Weighing and Measuring
The drachms in the above table are the old apothecaries drachms of 60 grains.                                                  .
Conversion of Minims, Drachms, Ounces, and Pints to Millilitres (Approximately Cubic Centimetres) and Litres.
Conversion of Grains and Ounces into Grammes.
Troy weight (used for gold, silver, and platinum). The ounce of 480 grs. is divided into 20 pennyweights of 24 grs.