Enquire within upon everything by Robert Kemp Philp

663. Measures.--Liquid

Liquid medicines are always measured by the following table: 60 minims......... \ / 1 fluid drachm. 8 fluid drachms | are | 1 fluid ounce. 20 fluid ounces... | contained | 1 pint. 8 pints.......... / in \ 1 gallon. And the signs which distinguish each are as follows:--c. means a gallon; o a pint; _fl_ [*ounce], a fluid ounce; _fl_ [*drachm], a fluid drachm; and m, a minim, or drop. Formerly drops used to be ordered, but as the size of a drop must necessarily vary, minims are always directed to be employed now for any particular medicine, although for such medicines as oil of cloves, essence of ginger, &c., drops are frequently ordered.