The SciencesColloid ReliefsMaking and Direct Printing from Colloid SurfacesBy Thomas Bolas on May 29, 1897AdvertisementABOUT THE AUTHOR(S)Recent Articles by Thomas BolasOrigination of Printing Types by Photographic MethodsA Tallow Lamp for Glass Blowing and Other Blowpipe WorkContributions to the Bibliography of Photography in Colors