TESTIMONIALS.
"I have tested Merck's pyro carefully in comparison with the other pyros at present on the market, and I find that it is superior to any and all of them."
Prof. Charles Ehrmann,
Instructor of the Chautauqua School of Photography.
"I shall, in future, certainly use no other pyro but Merck's. The best is always good enough for me."
Alfred Stieglitz,
Editor American Amateur Photographer.
"Merck's Pyrogallic Acid will be found a very superior article. Its purity is absolute, with quick crystallization and immaculate whiteness. In use, it produces the highest intensity that can be desired in the negatives. The detail in light and shade is perfect, producing printing qualities unsurpassed by any pyro we have ever used."
St. Louis and Canadian Photographer.