“What medium—gum, multiple gum, bromoil, platinum, bromide, chloride—is most popular today?”

“Bromide and chloride are the most popular. That this is so is probably because they are easier to use; but there are very earnest workers—some of the best—who insist on using the processes which give a greater range and greater possibilities of [pg 8] quality, such as bromoil, gum, and gum platinum. I would say that these processes are more popular than they used to be.”