Mix the starch with the water and vinegar. Then add 2 ml of iodine tincture and rainwater to get a litre of the preparation.

Iodine in water is yellow, and when added to the food color the result ... To one of the tubes containing the mixed solution, add two inches of hexane. Stopper with a cork and shake to mix. To one of ...

A lack of natural iodine in the soil and water, and an iodine-poor diet, led to the "characteristic neck swellings": enlarged thyroid glands. But after iodine supplements were shown to help ...