The chemical composition of a typical sample of this material is approximately: .061 C .019 H .001 Fe .031 Mg .007 A1 .020 P . ... Method for controlling the rate of devitrification Family Cites Families (3). * Cited by examiner, † Cited by third party. ... The connecting wire 9i may be a short length of fine silver wire say #40 B and S gauge or fine enough so that its shadow cast ... 53 and 54 may comprise coin silver, brass, steel or other suitable metal soldered to the rhodium-plated ends of the silicon ...