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  • Thumbnail for File:Garfield WA 1904-1918.jpg
    English Garfield, Washington house seen in a real photo postcard print c. 1904-1918...
    (656 × 455 (105 KB)) - 00:00, 5 October 2024
  • Thumbnail for File:Records and briefs of the United States Circuit Court of Appeals for the Ninth Circuit (IA govuscourtsca9briefs1941x).pdf
    the azo dyestuff coupling component of the developer. The print is then diazo This of the latent formation of a finished positive diazo print which...
    (935 × 1,566 (10.12 MB)) - 14:05, 9 October 2024
  • Thumbnail for File:Photographic workroom handbook (IA photographicwork00blum 1).pdf
    Q. Concentrated—Plates, Films and Papers.6 DEVELOPER For Portrait Prints on AZO Paper ..13 DEVELOPER For Producing three degrees of contrast, suitable...
    (1,272 × 2,091 (7.33 MB)) - 14:19, 20 October 2022
  • Thumbnail for File:Ensenada - Guanica Central.jpg
    DescriptionEnsenada - Guanica Central.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (1,511 × 946 (827 KB)) - 17:22, 28 March 2024
  • Thumbnail for File:Puerto Rico - harvesting pineapples.jpg
    DescriptionPuerto Rico - harvesting pineapples.jpg English: Photographic print (postcard) AZO paper Date circa 1920 Source Digital scan of postcard Author Unknown...
    (1,599 × 1,009 (580 KB)) - 01:27, 24 January 2024
  • Thumbnail for File:Puerto Rico - Coconuts.jpg
    DescriptionPuerto Rico - Coconuts.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (3,079 × 1,869 (1.29 MB)) - 09:14, 16 October 2024
  • Thumbnail for File:Photographic workroom handbook (IA photographicwork00blum 0).pdf
    Concentrated—Plates, Films and Papers .. 6 DEVELOPER For Portrait Prints on Azo Paper . 13 DEVELOPER For Producing three degrees of contrast, suitable...
    (1,287 × 2,025 (7.36 MB)) - 14:19, 20 October 2022
  • Thumbnail for File:Mayaguez - City view.jpg
    DescriptionMayaguez - City view.jpg English: Photographic print (postcard) Divided back, AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480...
    (1,522 × 939 (377 KB)) - 23:53, 8 June 2023
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.214).jpg
    The date is given by the figuration of the stamp placement on back, the 'Azo' mark with two triangles facing up and two triangles facing down dates it...
    (1,029 × 1,600 (232 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Puerto Rico - Casa de Campo.jpg
    DescriptionPuerto Rico - Casa de Campo.jpg English: Photographic print (postcard) Divided back AZO paper Date circa 1910 date QS:P,+1910-00-00T00:00:00Z/9,P1480...
    (1,506 × 931 (757 KB)) - 09:18, 16 October 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.76).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,020 (235 KB)) - 17:31, 6 October 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.77 1).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,025 (251 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Photographic workroom handbook (IA photographicwork00blum).pdf
    Q. Concentrated—Plates, Films and Papers... DEVELOPER For Portrait Prints on Azo Paper. DEVELOPER For Producing three degrees of contrast, suitable for...
    (1,237 × 2,020 (7.29 MB)) - 14:19, 20 October 2022
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.171).jpg
    The date is given by the figuration of the stamp placement on back, the 'Azo' mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,016 (247 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.222).jpg
    The date is given by the figuration of the stamp placement on back, the 'Azo' mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,033 (159 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Naguabo - Rio Santiago.jpg
    DescriptionNaguabo - Rio Santiago.jpg English: Photographic print (postcard) AZO paper Date circa 1915 Source Digital scan of postcard Author Attilio Moscioni...
    (3,216 × 2,031 (2.18 MB)) - 21:17, 15 November 2024
  • Thumbnail for File:Coamo Springs Hotel - Entrance.jpg
    DescriptionCoamo Springs Hotel - Entrance.jpg English: Photographic print (postcard) AZO paper No. 91 Date 1923 Source Digital scan of postcard Author Jose...
    (1,509 × 934 (1.24 MB)) - 11:05, 24 March 2024
  • Thumbnail for File:Puerto Rico - Central Guanica.jpg
    DescriptionPuerto Rico - Central Guanica.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (1,473 × 940 (483 KB)) - 09:18, 16 October 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.177).jpg
    The date is given by the figuration of the stamp placement on back, the 'Azo' mark with two triangles facing up and two triangles facing down dates it...
    (1,040 × 1,600 (274 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Puerto Rico - Aibonito Panorama.jpg
    DescriptionPuerto Rico - Aibonito Panorama.jpg English: Photographic print (postcard) AZO paper Date circa 1920 Source Digital scan of postcard Author Attilio...
    (2,954 × 1,776 (1.2 MB)) - 09:45, 16 October 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.77).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,038 (260 KB)) - 22:37, 28 November 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.152).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with four triangles facing up dates it between 1904 - 1918. Source/Photographer...
    (1,034 × 1,600 (255 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:A dictionary of the coal tar colours (IA dictionaryofcoal00hursrich).pdf
    group, the N N-O radicles. , Curcumine S is an example. Azo Colouring Matters. Azo COLOURING MATTERS. 4. Aniline Yellow, Crocein Scarlet, Congo...
    (958 × 1,454 (17.5 MB)) - 19:05, 28 June 2023
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.78).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,029 (246 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.226).jpg
    The date is given by the figuration of the stamp placement on back, the 'Azo' mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,059 (172 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Central Guanica - View 02.jpg
    DescriptionCentral Guanica - View 02.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (1,000 × 624 (93 KB)) - 16:11, 1 June 2024
  • Thumbnail for File:Application of the benzidine colours in all branches of printing (IA applicationofben1898farb).pdf
    cover printed with Aniline Black. cover printed with Aniline Black. No. 15. No. 16. Dyed with Benzo Purpurine 4 B Dyed with Azo ; cover printed with...
    (1,352 × 1,960 (8.95 MB)) - 16:57, 9 September 2023
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.75).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,032 (283 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Puerto Rico - Culebra.jpg
    DescriptionPuerto Rico - Culebra.jpg English: Photographic print (postcard) AZO paper Date circa 1915 Source Digital scan of postcard Author Unknown author...
    (1,582 × 992 (644 KB)) - 12:34, 28 January 2023
  • Thumbnail for File:Central Guanica - View 01.jpg
    DescriptionCentral Guanica - View 01.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (1,000 × 635 (92 KB)) - 16:11, 1 June 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.225).jpg
    The date is given by the figuration of the stamp placement on back, the 'Azo' mark with two triangles facing up and two triangles facing down dates it...
    (1,600 × 1,057 (184 KB)) - 22:29, 19 July 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.182).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with four triangles facing up dates it between 1904 - 1918. Related...
    (1,017 × 1,600 (283 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Puerto Rico - Country home.jpg
    DescriptionPuerto Rico - Country home.jpg English: Photographic print (postcard) AZO paper Date circa 1920 Source Digital scan of postcard Author Attilio...
    (2,990 × 1,875 (1.44 MB)) - 09:45, 16 October 2024
  • Thumbnail for File:Puerto Rico - Comerio Road 2.jpg
    DescriptionPuerto Rico - Comerio Road 2.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (3,066 × 1,878 (1,014 KB)) - 09:45, 16 October 2024
  • Thumbnail for File:Central Guanica - View 03.jpg
    DescriptionCentral Guanica - View 03.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (1,000 × 620 (87 KB)) - 16:11, 1 June 2024
  • Thumbnail for File:Ensenada - Protestant church.jpg
    DescriptionEnsenada - Protestant church.jpg English: Photographic print (postcard) AZO paper Date circa 1925 date QS:P,+1925-00-00T00:00:00Z/9,P1480,Q5727902...
    (948 × 1,513 (927 KB)) - 16:29, 1 April 2024
  • Thumbnail for File:Coamo Springs Hotel - Partial View.jpg
    DescriptionCoamo Springs Hotel - Partial View.jpg English: Photographic print (postcard) AZO paper No. 95 Date 1923 Source Digital scan of postcard Author Jose...
    (1,513 × 916 (1.19 MB)) - 12:47, 24 March 2024
  • Thumbnail for File:Postcard, photographic print (BM Am,B73.186).jpg
    The date is given by the figuration of the stamp placement on back, the Azo mark with four triangles facing up dates it between 1904 - 1918. Source/Photographer...
    (1,020 × 1,600 (267 KB)) - 15:02, 11 January 2024
  • Thumbnail for File:Puerto Rico - Country road.jpg
    DescriptionPuerto Rico - Country road.jpg English: Photographic print (postcard) AZO paper No. 11 Date circa 1925 date QS:P,+1925-00-00T00:00:00Z/9,P1480...
    (1,584 × 977 (977 KB)) - 23:53, 27 March 2024
  • Thumbnail for File:Puerto Rico - Coamo Springs Hotel.jpg
    DescriptionPuerto Rico - Coamo Springs Hotel.jpg English: Photographic print (postcard) AZO paper Date circa 1925 date QS:P,+1925-00-00T00:00:00Z/9,P1480,Q5727902...
    (1,493 × 927 (737 KB)) - 09:18, 16 October 2024
  • Thumbnail for File:Guantanamo Bay - Returning aboard.jpg
    DescriptionGuantanamo Bay - Returning aboard.jpg English: Photographic print (postcard) AZO paper Date circa 1915 Source Digital scan of postcard Author Unknown...
    (1,519 × 959 (863 KB)) - 12:04, 24 November 2024
  • Thumbnail for File:Puerto Rico - Pineapple field.jpg
    DescriptionPuerto Rico - Pineapple field.jpg English: Photographic print (postcard) AZO paper Date circa 1920 Source Digital scan of postcard Author Attilio...
    (3,018 × 1,826 (1.64 MB)) - 09:45, 16 October 2024
  • Thumbnail for File:Puerto Rico - Country Huts.jpg
    DescriptionPuerto Rico - Country Huts.jpg English: Photographic print (postcard) AZO paper Date circa 1920 date QS:P,+1920-00-00T00:00:00Z/9,P1480,Q5727902...
    (1,520 × 939 (759 KB)) - 09:45, 16 October 2024
  • Thumbnail for File:Cuba - Scenes of Matanzas.jpg
    DescriptionCuba - Scenes of Matanzas.jpg English: Photographic print (postcard) Divided back AZO paper Date circa 1910 date QS:P,+1910-00-00T00:00:00Z/9,P1480...
    (1,519 × 970 (1.23 MB)) - 16:43, 1 August 2024
  • Thumbnail for File:Guayama - Cine Campoamor.jpg
    DescriptionGuayama - Cine Campoamor.jpg English: Photographic print (postcard) Divided back AZO paper Date circa 1925 Source Digital scan of postcard Author...
    (1,578 × 989 (763 KB)) - 15:00, 15 September 2024
  • Thumbnail for File:Puerto Rico - Guajataca beach and tunnel.jpg
    DescriptionPuerto Rico - Guajataca beach and tunnel.jpg English: Photographic print (postcard) AZO paper Date circa 1925 date QS:P,+1925-00-00T00:00:00Z/9,P1480,Q5727902...
    (3,181 × 2,030 (1.36 MB)) - 17:01, 31 July 2024
  • Thumbnail for File:Puerto Rico - Guajataca River.jpg
    DescriptionPuerto Rico - Guajataca River.jpg English: Photographic print (postcard) AZO paper Date circa 1920 Source Digital scan of postcard Author Unknown...
    (2,955 × 1,755 (1.34 MB)) - 13:20, 31 December 2023
  • Thumbnail for File:Puerto Rico - Palmeras de coco.jpg
    DescriptionPuerto Rico - Palmeras de coco.jpg English: Photographic print (postcard) AZO paper May be former Borinquen Park Date circa 1920 date QS:P...
    (969 × 1,512 (850 KB)) - 12:58, 3 April 2023
  • Thumbnail for File:Mayaguez - Interior, Cathedral.jpg
    DescriptionMayaguez - Interior, Cathedral.jpg English: Photographic print (postcard) AZO paper Shows church interior prior to devastating earthquake of 1918...
    (3,196 × 2,061 (1.75 MB)) - 11:05, 26 May 2024
  • Thumbnail for File:Miami Beach - Hardie's Casino, 1926.jpg
    DescriptionMiami Beach - Hardie's Casino, 1926.jpg English: Photographic print (postcard) AZO paper Shows effects of September 18, 1926 hurricane Date 1926 Source...
    (1,501 × 947 (816 KB)) - 18:37, 27 February 2024
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