Series 1. Citrus research and industry 1882-1954, undated
Manuscripts and publications about citrus bud selection, including a chapter written for one of Dr. Herbert J. Webber's books 1937, undated.
Statistics, publications, and photographs regarding citrus improvement 1909-1923, undated.
Publications, papers, and photographs about frost protection methods for citrus trees 1913, undated.
Photographs depicting pruning experiments conducted at the Citrus Experiment Station in Riverside, CA 1914-1915.
Statistics and notes recording the performance data of citrus trees, including annual fruit yields 1913-1916.
Manuscripts and publications describing the many types of citrus strains 1937, undated.
Photographs of orchard irrigation methods and equipment 1911-1927.
Photographs of the Shamel humidifier, invented by Archibald D. Shamel to improve citrus storage 1915.
Photographs of orchard heating equipment 1914-1937.
Photographs of fruit workers, orchard equipment, and fruit growing community buildings undated.
Photographs of orchard equipment 1910-1919.
Photographs of orchard equipment 1920-1922.
Photographs and papers regarding orchard equipment 1923-1937, undated.
Photographs of citrus orchards in Southern California, including the Citrus Experiment Station in Riverside 1904-1923.
Photographs of citrus orchards in Southern California, including the Citrus Experiment Station in Riverside 1924-1936, undated.
Photographs of citrus packing houses 1910-1931.
Photographs, publications, and clippings regarding citrus workers 1915-1931, undated.
Photographs of housing for citrus workers, including the racially segregated buildings for both single and married men 1914-1918.
Photographs, clippings, and publications regarding housing for citrus workers, including the racially segregated quarters for both single and married men 1918-1929, undated.
Scrapbook with photographs and captions of Elbert Lewis, an early citrus grower 1912, undated.
Correspondence, papers, and clippings regarding grapefruit research and the grapefruit industry 1926-1934, undated.
Photographs of grapefruit trees and grapefruit orchard equipment 1919-1937, undated.
Photographs of different varieties of grapefruit, including cross sections and mutations 1916-1929, undated.
Correspondence, notes, and papers regarding lemon research and the lemon industry 1914-1954, undated.
Photographs of lemon orchards and lemon trees 1913-1932, undated.
Photographs of lemons, including cross sections and mutations 1914, undated.
Photographs of tangerines 1915 .
Photographs, correspondence, and papers regarding orange varieties and the orange industry 1918-1937.
Photographs of navel orange trees and navel oranges 1918-1936, undated.
Correspondence, clippings, and papers regarding the history of the navel orange. Clippings from multiple newspapers recount Archibald D. Shamel's trip to Bahia, Brazil with President Roosevelt 1882-1940, undated.
Correspondence, papers, and clippings regarding the Riverside Parent Navel Orange Tree. Includes items regarding Eliza and Luther Tibbets 1887-1934, undated.
Photographs regarding the Riverside Parent Navel Orange Tree, including President Roosevelt replanting the tree in downtown Riverside 1900-1921.
Photographs regarding the Riverside Parent Navel Orange Tree 1922-1933.
Clippings and publications regarding the Riverside Parent Navel Orange Pageant 1933-1934.
Photographs of valencia oranges, including cross sections and mutations 1912-1925, undated.
Publications and correspondence regarding valencia oranges 1916-1952, undated.
Photographs of transplanting valencia orange trees 1922.
Publications, papers, and correspondence regarding the esthetics of orange growing 1928-1937.
Photographs and documents regarding the Citrus Experiment Station in Riverside, California 1916-1926, undated.
Glass plate negatives of orange trees, 539-556 (broken series) 1912-1915, undated.
Glass plate negatives of orange trees, 557-673 (broken series) 1910-1915, undated.
Glass plate negatives of orange trees, 681-835 (broken series) 1910-1911, undated.
Glass plate negatives of orange trees, 837-1269 (broken series) 1911-1918, undated.
Glass plate negatives of orange trees, 1266-1327 (broken series) 1915-1917, undated.
Glass plate negatives of orange trees and oranges, 1329-2021 (broken series) 1917, undated.
Glass plate negatives of lemon trees, 565-863 (broken series) 1911-1914, undated.
Glass plate negatives of lemon trees, 865-888 (broken series) 1911-1914, undated.
Glass plate negatives of lemon trees and lemons, 889-1319 (broken series) 1913-1916, undated.
Glass plate negatives of lemon trees and lemons, 1320-1423 (broken series) 1911-1918, undated.
Glass plate negatives of grapefruit trees and grapefruit, 648-2016 (broken series) 1911-1923, undated.
Glass plate negatives of orchard equipment and orchard worker housing. Some items contain basic descriptions photocopied from the original envelopes, 563-2058 (broken series) 1918-1922, undated.
Clippings from the farm and tractor section of the Los Angeles Times. Page 3 contains the article "The importance of improving established citrus varieties" by Archibald D. Shamel May 25, 1919.
Clippings of articles written by Archibald D. Shamel regarding grapefruit and the grapefruit industry in California 1920.
Clippings from the California Citrograph of an article written by Archibald D. Shamel and C.S. Pomeroy about girdling navel orange trees 1933.
Clipping and correspondence regarding the Riverside Parent Navel Orange Tree and Eliza and Luther Tibbets 1887-1943.
Glass plate negatives of lemon trees, lemons, grapefruit trees, and grapefruit, 613-2016 (broken series) 1910-1917, undated.
Glass plate negatives of orchard equipment and orchard worker housing. Some items contain basic descriptions photocopied from the original envelopes, 2018-2031 (broken series) 1918-1922, undated.
Series 2. Non-citrus crops 1899-1947, undated
Photographs and publications regarding avocados and the avocado industry 1921-1938, undated.
Publications and photographs regarding apples, including histories of the oldest apple trees in the United States 1921-1937.
Photographs of sweet potatoes 1925.
Photographs regarding the history of corn and the corn industry. Notable images include corn judging classes from 1899 and the Iowa seed corn gospel train 1899-1925, undated.
Photographs of tobacco crops and equipment. Notable images include tobacco plants with paper bags placed over the blossoms, a crop improvement method invented by Shamel 1905-1917, undated.
Photographs of artichoke fields and artichokes 1917-1918, undated.
Correspondence and clippings about soy beans and soy bean growing 1947.
Photographs of asparagus and asparagus plants 1918.
Photographs of dates and date palm groves 1916-1922.
Photographs of dates and date palm groves 1923-1937, undated.
Photographs and papers regarding peaches and the history of specific peach trees 1925-1937, undated.
Photographs of pears, including cross sections and mutations 1918-1927.
Correspondence and photographs regarding pears and pear trees 1930-1938, undated.
Photographs and clippings regarding grape vines, plum trees, and persimmons 1907-1936, undated.
Photographs of pistachio trees 1929.
Glass plate negatives of artichoke fields, tobacco fields, date palm groves, and other non citrus crops, 1363-2185 (broken series) 1907-1917, undated.
Clippings of an article written by Archibald D. Shamel and C. S. Pomeroy about apple and pear trees planted during the gold rush in Douglas Flat, California November 5, 1933.
Glass plate negatives of asparagus, pears, avocado, and mango, 1401-1420 and 2015-2185 (broken series) 1907-1971, undated.
Series 3. Trees and flowers 1911-1943, undated
Publications, correspondence, and photographs regarding athel trees 1943.
Photographs and notes regarding the agatha robusta trees planted at the Citrus Experiment Station in Riverside, California 1943.
Photographs of cactus in California and Arizona 1922.
Photographs, specimens, and papers regarding the California pepper tree 1941-1943, undated.
Correspondence, photographs, and pamphlets regarding the history of the Christmas trees that line the main road in Alta Dena, California 1936.
Papers and correspondence regarding the Mexican ash tree 1942, undated.
Photographs of oak root fungus 1942.
Photographs, clippings, and publications regarding different varieties of shade trees. Includes a pamphlet regarding the trees in Yosemite and Sequoia National Parks 1911-1943, undated.
Photographs and papers regarding different varieties of flowers, including the history of the Cecile Brunner rose 1917-1929, undated.
Glass plate negatives of shade trees and flowers, 1340-1362 1917-1918, undated.
Series 4. Local history 1918-1954, undated
Clippings and papers regarding the Riverside Beautification Committee 1950-1954, undated.
Publications regarding trees planted in Corona, California undated.
Photographs of the J. Harrison Wright house located in Riverside, California 1929.
Photographs of Riverside, California 1918-1954, undated.
Clippings and papers regarding Riverside, California 1950-1954, undated.
Papers from the Riverside Rotary Club 1953, undated.
Reports and clippings from the Riverside Parks Department 1943-1953, undated.
Papers and notes written by Archibald D. Shamel regarding his various personal research interests, including early California history 1936-1938, undated.
Clippings about Archibald D. Shamel 1936-1951.
Photographs from family trips to Idyllwild, San Jacinto, and Palm Springs, California 1922-1926.
Glass plate negatives of Mecca and Thermal, California, 1410-1411 1917-1918, undated.
Series 5. Research trips 1913-1941
Clippings, publications, and photographs regarding a research trip to Bahia, Brazil to study citrus 1913.
Lists of lantern slides and photographs from a Brazil research trip 1913.
Paper on orange growing in Brazil undated.
Photographs from a Brazil research trip, 10-411 (broken series). Notable images include Theodore Roosevelt with Archibald D. Shamel on the ship to Brazil 1913.
Photographs from a Brazil research trip, 420-588 1913.
Photographs from a Brazil research trip, 589-949 1913.
Photographs from a Brazil research trip, 951-17081 1913.
Photographs from a Brazil research trip, 17082-2184 1913.
Photographs from a West Indies and Barbados research trip 1914.
Photographs from Hawaii research trips, including multiple images of an exploding volcano 1920-1922.
Photographs from Hawaii research trips 1923-1927.
Paper on orange growing in Hawaii undated.
Photographs with descriptions from a research trip to Honduras, 37691-37712 1926.
Photographs with descriptions from a research trip to Honduras, 37713-37720 1926.
Clippings, photographs, and papers regarding El Tule, the oldest tree in Mexico 1937.
Papers, postcards, and a report to the United States Agriculture Department regarding Archibald D. Shamel's research trip to Mexico 1938.
Notebooks (three) containing sketches and data from Archibald D. Shamel's research trip to Mexico 1938.
Documents describing ornamental trees and plants in Mexico undated.
Papers regarding evergreen willow trees in Mexico 1939.
Papers regarding Mexican limes and lime trees 1941.
Map of the Mexican railway system 1937.
List of the photographs taken during Shamel's Mexico research trip 1938.
Photographs gathered from research trips to Mexico 1930-1938.
Postcards from Mexico research trips undated.
Photographs from a Mexico research trip, 51004-51045 (broken series). Images include native plants, Mexican villages and towns, and notable tourist sites 1930.
Photographs from Mexico research trips, 51046-51255 (broken series) 1930-1931.
Photographs from a Mexico research trip, 51256-51290 (broken series) 1938.
Photographs from a Mexico research trip, 5291-51306 (broken series) 1938.
Photographs from Mexico research trips, 51307-51320 (broken series) 1936-1938.
Photographs from a Mexico research trip, 51321-51329 (broken series) 1936.
Photographs from a research trip to Guatemala, 37727-37734 (broken series). Images include native plants, native animals, and village scenes 1926.
Photographs from a Guatemala research trip, 37736-37746 (broken series) 1926.
Photographs from a research trip to Mesa, Arizona. Images include the Roosevelt dam and the Salt River 1925.
Photographs from a research trip to Mississippi. Images include riverboats and orchard equipment 1926.