Bell's specific is a solution of colloidal lead (a colloid is a gluelike, noncrystalline organic substance that will not pass through a membrane), which appears to have a marked .
The crystals disclosed a vitamin potency of 3,000,000 international units, whereas the Drummond noncrystalline concentrates had not exceeded 2,000,000.
X-raying of the structure of rubber, which is amorphous (noncrystalline) when unstretched and develops fibre-crystals when stretched at various tensions, was noted as a likely .