Electric Conduction in Hard Rubber, Pyrex, Fused and Crystalline Quartz

Analytical Method for Determination of Long-Life Carbon C14

“…It is apparent that electrical leakage from the silvered and Aquadaged surfaces will also neutralize the charge on the repelling post. To prevent this the ionization chamber was made of quartz, in view' of its high electrical resistance (7); as was to be expected (7), Pyrex proved to be unsatisfactory. Furthermore the ceresin wax minimized exterior surface conduction due to the absorption of water vapor on the quartz.…”

“…These potentials are somewhat in excess of that necessary for maximum collection of ions. The continual maintenance of the above voltages is necessary because of the initial flow of polarization current or "soak in charge" into the quartz insulation; about 18 hours were required to attain complete equilibrium (7).…”

“…per hour, (7)]; and unlike air (30 a'r per hour per 100 cc. ), the number of alpha-particles emitted from pure carbon dioxide is not measurable (7).…”