This section is from the book "A Text-Book Of Materia Medica, Pharmacology And Therapeutics", by George F. Butler. Also available from Amazon: A text-book of materia medica, pharmacology and therapeutics.
They are made by trituration.
Pulvis - Gm.in 100
Acetanilidi Compositus... ........... acetanilide 70, caffein
cardamom (seed), nutmeg, each
Cretae Compositus . acacia p. 20; sugar 50; prep. chalk
Ipecacuanhae et Opii.............. ipecac, opium pulv., each
(Dover's Powder) sugar of milk
Jalapae Compositus ............. potass, bitartrate 65; jalap
Morphinae Compositus .............camphor 32; morphine
(Tully's Powder) sulph.
calcium carb., precip. 33.5; glycyrrhiza p.
Rhei Compositus . magnesium oxide 65; ginger 10;
For 12 power.; Gm.
in each Gr.
Effervescens Compositus........... (Seidlitz Powder) potassium and sodium tartrate
Many methods are in use for the purpose of disguising the taste of disagreeable remedies in the powder form. Of these the most elegant and effective method is that of enclosing the powder in a cachet or wafer. Originally wafers were made of starch-paste in thin sheets; a piece about 0.5 dcm. (2 inches) square, immersed in water for a minute, being placed in a spoon, the powder poured into it, and then enwrapped by folding up the edges and swallowed with a little water. The cachets or "konseals" are wafer-disks consisting of two concentric halves, one of which is filled with the powder, and the other half attached by moistening the edge and pressing the edges together by means of various devices. These cachets are of three sizes, the largest holding 5 grains (0.3) Quinine Sulphate. After a moment's immersion in water they can be swallowed without any effort.