A concentrated solution of iodine is prepared by putting into a common bottle two thimblesful of hyposulphite of soda and a rather larger quantity of iodine, so that there may be more than sufficient.

Add to it about 40 ounces of common water (heated to 60 or 70 degrees), by little and little, moving, the bottle to warm it, for fear of breaking.

After shaking it a short time, the water is rapidly and strongly colored.

The solution should be poured into a bottle with a ground stopper, and when cool used for iodizing.
A solution of sufficient strength can be made by moistening or just covering the iodine with water.
Chloride of Iodine as an Accelerator .-- This is probably one of the best accelerators that can be used for coating the plate for taking views; it works too slow, however, to meet the wants of the operating room, yet its use was formerly, for a long time, adhered to by some of our best professors.

In producing views with this, we are successful in obtaining well-developed impressions, with a depth of tone and richness of appearance not to be met with in the productions of any other substances.