Collection Timeline

1908 to 1955

1908
Iowa State College Bachelor of Science diploma for Ada Hayden given on June 4, 1908.

1909
Letter from Ada Hayden to Elizabeth, discussing travel and work.
Letter from Louis Hermann Pammel to Ada Hayden, describing recent meetings and thanking Hayden for her work.
Letter from Louis Hermann Pammel to D. M. Hayden, regarding sending cylinders to Ada Hayden in St. Louis.
Letter from Louis Hermann Pammel to Ada Hayden, responding to an inquiry about the Academy of Science.
Letter from Louis Hermann Pammel to D. M. Hayden, regarding sending cylinders to Ada Hayden.
Letter from Louis Hermann Pammel to Ada Hayden, discussing the naming of various plants.
Letter from Ada Hayden to Louis Hermann Pammel, describing recent botanical field work.
Letter from Louis Hermann Pammel to Ada Hayden, regarding sending cylinders to Ada Hayden.
Letter from D. M. Hayden to Louis Hermann Pammel, notifying Pammel that plant driers and cylinders had been delivered.
Letter from Ada Hayden to Louis Hermann Pammel, inquiring about membership to the Academy of Science and describing her time in Saint Louis.
Letter from Ada Hayden to Louis Hermann Pammel, describing soil collection plans for the summer and sending of samples.

1910
Letter from Louis Hermann Pammel to Ada Hayden, in response to an inquiry about writing a recommendation.
Letter from Ada Hayden to Louis Hermann Pammel, responding to Pammels inquiry about working at Iowa State University for the next year.
Letter from Ada Hayden to Louis Hermann Pammel, accepting an appointment as instructor in Botany at Iowa State University.
Letter from Louis Hermann Pammel to Ada Hayden, offering to give a personal recommendation for Hayden's applications for jobs.
Letter from Louis Hermann Pammel to D. M. Hayden, thanking Hayden for dropping of botanical specimens.
Letter from Louis Hermann Pammel to Ada Hayden, regarding summer employment at Iowa State University and watercolor sketches of botanical specimens.
Letter from Louis Hermann Pammel to Ada Hayden, regarding Hayden's appointment as an instructor in Botany at Iowa State University.
Letter from Louis Hermann Pammel to Ada Hayden, asking Hayden to work at Iowa State University for the next year.
Letter from Ada Hayden to Louis Hermann Pammel, describing recent professional development.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens from Missouri.
Letter from Louis Hermann Pammel to Ada Hayden, requesting botanical samples of tree varieties from the Missouri Botanical Garden.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens.
Letter from John Kendall to Louis Hermann Pammel, regarding a recommendation of employment at New Hampshire College from Pammel for Ada Hayden.
Letter from Ada Hayden to Louis Hermann Pammel, describing correspondence she had with someone in the Veterinary College regarding dissection work.
Letter from Ada Hayden to Louis Hermann Pammel, responding to an inquiry by Pammel about having watercolors done as botanical studies.
Letter from Ada Hayden to Louis Hermann Pammel, describing plants that were sent to Pammel.
Letter from Ada Hayden to Louis Hermann, giving remarks on a paper by Pammel about bog plants and asking for a letter of recommendation from Pammel.
Sicyos angulateo (One-seeded bur cucumber).

1911
Letter of recommendation from Louis Hermann Pammel to the Superintendent of Public Schools in Minneapolis, Minnesota, commending on Hayden as a proper fit for teaching high school botany.

1912
Letter from Ada Hayden to Louis Hermann Pammel, regarding botanical specimens.

1915
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens sent by Hayden.

1916
Letter from Ada Hayden to Louis Hermann Pammel, explaining that her work is suffering due to illness.
Letter from Louis Hermann Pammel to Ada Hayden, regarding leave of absence due to illness.
Letter from Herbert Jones to Louis Hermann Pammel, advising that Ada Hayden be relieved from work temporarily due to illness.
Letter from Dr. Gates Roberts to Ada Hayden, regarding Hayden's absence from a finance committee due to her illness.
Letter from Louis Hermann Pammel to Dr. Buchanan, presenting a case for taking over Ada Hayden's classes while she is ill.
Letter Louis Hermann Pammel to Ada Hayden, responding to a payment inquiry by Hayden and vacation plans.

1917
Letter from Louis Hermann Pammel to Ada Hayden, regarding payment and botanical specimens.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens from Texas sent by Hayden.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens of grasses sent by Hayden.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens sent by Hayden.
Letter from Louis Hermann Pammel to Ada Hayden, regarding a check, botanical specimens and a camera.
Letter from Ada Hayden to Louis Hermann Pammel, enclosing a check for payment.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens and her leave of absence due to illness.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens, a camera and Hayden's recent work with ecological study of oaks.
Letter from Louis Hermann Pammel to Ada Hayden, enclosing a check for payment and thanking Hayden for botanical specimens.
Letter from Louis Hermann Pammel to Ada Hayden, regarding botanical specimens and photographs sent by Hayden.
Letter from Louis Hermann Pammel to T. W. Shearer, thanking Shearer for a favor.
Letter from Ada Hayden to Louis Hermann Pammel, describing her work in Texas.
Letters from Ada Hayden to Louis Hermann Pammel, describing her work in Texas and explaining items sent to Pammel.
Letter from Ada Hayden to Louis Hermann Pammel, describing her desire to continue working and her project in Houston, Texas.
Letter from Ada Hayden to Louis Hermann Pammel, describing the oak woods and parks surrounding Houston, Texas and her trips to them.
Letter from Ada Hayden to Louis Hermann Pammel, describing items sent to Pammel.
Letter from Louis Hermann Pammel to Ada Hayden, responding to a letter from Hayden concerning sending wood specimens from Texas, payment for photographs and further plans.

1918
Erigeron (Fleabane) specimens (hand colored), including flowers and leaves, identified as negative 872. Suburban Isle Park.
Erigeron (Fleabane) specimen (hand colored), including flowers and leaves, identified as negative 872. Location: Suburban Isle Park.
Hieracium canadense (Canada hawkweed) specimen (hand colored), including flowers and leaves,identified as negative 880. Location: Spencer Creek.
Rudbeckia hirta (Black-eyed Susan) specimen (hand colored), including flowers and leaf, identified as negative 900. Location: Suburban Isle Park.
Monarda fistulosa (Wild bergamot) specimen (hand colored), including flowers and leaves, identified as negative 928.
Vernonia fasciculata (Ironweed) specimen (hand colored), including flowers and leaves, identified as negative 952.
Eripatorium serolinum (Late-flowering Thoroughwort ) specimen (hand colored), including flowers and leaves, identified as negative 965.
Silphium perfoliatum (Indian cup) specimen (hand colored), including flowers and leaves, identified as negative 968.
Echinocystis lobata (Wild balsam apple) specimen (hand colored), including flowers and leaves, identified as negative 969.
Aster novae-angliae (New England aster) specimen (hand colored), including flowers and leaves, identified as negative 989.
Bidens frondosa (Beggar-ticks; Boot-jacks) specimen (hand colored), including flowers and leaves, identified as negative 999.
Iowa State College Doctor of Philosophy diploma for Ada Hayden given on May 29, 1918.
Letter from Administration of Iowa State College to Ada Hayden requesting participation in a faculty wide subscription to the United War Work Fund Campaign.
Letter from C.E. Allen to Louis Hermann Pammel, concerning the publication of a paper by Ada Hayden.
Letter rom C.E. Allen to Louis Hermann Pammel, regarding an essay written by Ada Hayden.
Letter from Louis Hermann Pammel to C. E. Allen, concerning a paper written by Ada Hayden and its publication.
Letter from Louis Hermann Pammel to C. E. Allen, concerning the publication of a paper by Ada Hayden.
Letter from C.E. Allen to Louis Hermann Pammel, concerning the publication of a paper by Ada Hayden.
Letter from Louis Hermann Pammel to C. E. Allen concerning the publication of a paper by Ada Hayden.

1919
Echinocystis lobata (Wild balsam apple) specimen (hand colored), including flowers and leaves, identified as negative 963.
Trifolium repens (White clover) specimen (hand colored), including flowers and leaves, identified as negative 1034.
Sicyos angulatus (One-seeded bur cucumber) specimen (hand colored), including flowers and leaves, identified as negative 1174.
Helianthus sp. (Sunflower) specimens (hand colored), including flowers and leaves, identified as negative 1177.
Bidens cernua (Stick-tight, smaller bur marigold) specimen (hand colored), including flowers and leaves, identified as negative 1324.
Bidens cernua (Stick-tight, smaller bur marigold) specimen (hand colored), including flowers and leaves, identified as negative 1325.
Bidens frondosa to the left and cernua to the right (Leafy-bracted tickseed) specimens (hand colored), including flowers and leaves, identified as negative 1326.
Trifolium repens (White clover) specimens (hand colored), including flowers and leaves.
Black and white photograph of a cornfield overrun with weeds.
Black and white photograph of cornfield receding into distance with sandy soil and overrun with weeds.
Black and white photograph of a cornfield receding into distance with sandy soil and overrun with weeds.
Letter from Louis Hermann Pammel to S. W. Beyer, supporting Ada Hayden's work at Iowa State College.
Letter from S. W. Beyer to Louis Hermann Pammel, explaining that Ada Hayden's salary cannot be increased enough to match an offer from a university in North Dakota.
Letter from Louis Hermann Pammel to S. W. Beyer, supporting an increase in salary for Ada Hayden at Iowa State College.
Letter from James D. Shearer to Louis Hermann Pammel, regarding Ada Hayden's position at Iowa State College.
Letter from Louis Hermann Pammel to S. W. Beyer, regarding Ada Hayden's attendance at a meeting.
Letter from Louis Hermann Pammel to S. W. Beyer, describing an enclosed letter from J. N. Martin that compliments Ada Hayden's work in the Iowa State College Department of Botany.
Letter from Ada Hayden to Louis Hermann Pammel, in response to being accused of attending a meeting that she was not supposed to attend.
Letter from J. D. Shearer to Louis Hermann Pammel notifying, Pammel that he has written to Dr. Stanton on behalf of Ada Hayden.
Letter from Louis Hermann Pammel to R. E. Buchanan, looking to supply Ada Hayden a desk.
Letter from S. W. Beyer to Louis Hermann Pammel, describing that Ada Hayden's salary cannot be raised at Iowa State College .
Letter from Ada Hayden to Louis Hermann Pammel, reflecting on her work with Iowa State College Department of Botany.
Letter from Louis Hermann Pammel to S. W. Beyer, supporting a better salary for Ada Hayden at Iowa State College.
Letter to Ada Hayden, describing a queries about wood flora.
Letter from S. W. Beyer to L. H. Pammel, regarding a meeting that Ada Hayden attended.
Letter from S. W. Beyer to Louis Hermann Pammel, stating that Ada Hayden attended a meeting on November 17 that she should not have attended.
Letter from Louis Hermann Pammel to S. W. Beyer, stating that Beyer's letter about Ada Hayden's salary has been shown to her.
Letter from S. W. Beyer to Louis Hermann Pammel, stating that no promotion or increase in salary may be offered to Ada Hayden in response to a job offer in North Dakota.
Letter from Louis Hermann Pammel to J. D. Shearer, advising Shearer not to write to S. W. Beyer or Dr. Stanton on behalf of Ada Hayden.
Letter from Louis Hermann Pammel to S. W. Beyer, describing an enclosed letter from J. N. Martin that compliments Ada Hayden's work in the Iowa State College Department of Botany.
Letter from Louis Hermann Pammel to S. W. Beyer, supporting Ada Hayden's work at Iowa State College.
Letter from S. W. Beyer to Louis Hermann Pammel, explaining that Ada Hayden's salary cannot be increased at Iowa State College to match an offer made from a university in North Dakota.
Letter from J. N. Martin to Louis Hermann Pammel, attempting to prevent Ada Hayden from leaving the Iowa State College Department of Botany.
Letter from Ada Hayden to Louis Hermann Pammel, in response to being accused of attending a meeting that she was not supposed to attend.
Letter from Ada Hayden to the Committee on the United War Efficiency Fund, describing her support of a plan to raise funds for the United War Efficiency Fund.
Letter from S. W. Beyer to Louis Hermann Pammel, supporting cooperation with the National Research Council and other organizations.
Letter from Ada Hayden to Louis Hermann Pammel, asking to purchase a desk for herself and another faculty member to increase efficiency.
Letter from Ada Hayden to Louis Hermann Pammel, regarding a meeting that Hayden attended.
Letter from Ada Hayden to Louis Hermann Pammel, describing recent work and a letter sent to Hayden from another professor.
Letter from Ada Hayden to Louis Hermann Pammel, describing recent botanical work.
Letter from S. W. Beyer to E. W. Stanton, supporting the promotion of Ada Hayden at Iowa State College.
Letter from Ada Hayden to Louis Hermann Pammel, forwarding letters to Pammel.
Letter from Ada Hayden to Louis Hermann Pammel describing her recent botanical work.
Letter from Louis Herman Pammel to J. D. Shearer, describing negotiations relating to Ada Hayden's position at Iowa State College.
Letter from Ada Hayden to Louis Hermann Pammel, requesting a desk.

1920
Eupatorium perfoliatum (Boneset) specimen (hand colored), including flowers and leaves, identified as negative 1310.
Liatris scariosa (Blazing star) specimens (2, hand colored), including flowers and leaves, identified as negatives 1314 and 1315.
Lycium barbarum L. (Matrimony vine) specimens (hand colored), including flowers and leaves, identified as negative 1327.
Letter from James Shearer to Ada Hayden, forwarding another letter from E. W. Stanton.
Letter from Louis Hermann Pammel to R. A. Pearson, forwarding a letter from J. A. Larsen in regards to a paper written by Ada Hayden.
Letter from Charles Curtiss to Louis Hermann Pammel, April 20, 1920 giving his opinion on a group of students at Iowa State College.
Letter from R. A. Pearson to Louis Hermann Pammel, supporting Ada Hayden's work.
Letter from E. W. Stanton to J. D. Shearer, in response to a request to raise Ada Hayden's salary at Iowa State College.
Letter from S. W. Beyer to Louis Hermann Pammel, supporting the work of Ada Hayden on conifers.
Letter from James Shearer to E. W. Stanton, committing to attend an event celebrating the fiftieth anniversary of Iowa State College.
Letter from Louis Hermann Pammel to Charles Curtiss, in response to a letter from Curtiss.
Letter from John Martin to Louis Hermann Pammel, describing discrepancies in the cost of credit hours across botany divisions at Iowa State College.

1921
Amorpha canescens (Lead plant) specimens (hand colored), including flowers and leaves, identified as negative 1397.
Echinacea purpurea (Coneflower) specimen (hand colored), including flowers and leaves, identified as negative 1398.
Cucumis melo (Muskmelon) specimen (hand colored), including flowers, fruit, and leaves, identified as negative 1410.
Prenanthes (Rattlesnake root) specimen (hand colored), including flowers and leaves, identified as negative 1472.
Aster multiflorus (Dense flowered aster) specimen (black and white), including flowers and leaves, identified as negative 1473. Noted as being on railroad track, road to Tower.
Alcea (Hollyhocks), in situ, LeClaire Main Street, Gilbert House (hand colored).
Letter to Louis Hermann Pammel from A. K. Peitersen, requesting that Ada Hayden send an application to teach summer school at Colorado Agricultural College.
Letter to A. K. Peitersen from Louis Hermann Pammel, suggesting Ada Hayden to teach summer school at Colorado Agricultural College.
Letter from Louis Hermann Pammel to A. K. Peitersen, commenting on Ada Hayden's abilities as a teacher.
Letter to Louis Hermann Pammel from A. K. Peitersen, looking for suggestions for a summer school teacher at the Colorado Agricultural College.
Letter from Ada Hayden to Elizabeth, requesting copies of a paper on the leaves of the Conifer.
Letter to Louis Hermann Pammel from Ada Hayden, regarding Hayden's position at Iowa State College and her desire for raise in pay.
Letter from Ada Hayden to Elizabeth, describing her train trip to Colorado and recent field work.
Letter from Ada Hayden to Louis Hermann Pammel, updating Pammel on her recent work and forwarding letters and photographs.
Letter from Ada Hayden to Louis Hermann Pammel, updating Pammel on recent work and discussing the purchase of lantern slides.
Letter from Ada Hayden to Louis Hermann Pammel describing plants she has found in her field work.

1922
Letter to Louis Hermann Pammel from Ada Hayden, describing recent academic work.
Letter from Ada Hayden to Louis Hermann Pammel regarding plants to be drawn for Pammel.
Letter from Ada Hayden to the Botanical Department survivors of the Spring malade.

1923
Photograph of Ada Hayden in Ames, Iowa for the Department of Botany on September 1923.
Letter from Louis Hermann Pammel to Secretary of Board of Fellowships in Biological Sciences at the National Research Council, recommending Ada Hayden for a botanical fellowship.
Letter from Louis Hermann Pammel to W. H. Stevenson, forwarding a statement from Ada Hayden about her research.
Letter from Louis Hermann Pammel to the Secretary of Board of Fellowships in Biological Sciences at the National Research Council, recommending Ada Hayden for a botanical fellowship.
Letter From Ada Hayden to Louis Hermann Pammel, describing recent work with algae culture and soils.
Letter from Ada Hayden to Louis Hermann Pammel, describing the difficulty of accessing records with a student.

1924
Letter from Louis Hermann Pammel to I. E. Melhus, requesting that Ada Hayden to create drawings of honey plants.
Letter from Ada Hayden to Louis Hermann Pammel, requesting to be considered for field work for the summer.
Letter from Ada Hayden to Louis Hermann, regarding economic botany courses and updating Pammel on her current work.

1925
Letter from Louis Hermann Pammel to Ada Hayden, suggesting stops for a field study trip to Northern Iowa.
Letter from Ada Hayden to Louis Hermann Pammel asking Pammel if there are any teaching opportunities available for the summer.
Letter from Louis Hermann Pammel to Ada Hayden, July 6, 1925 returning a check.
Letter from Ada Hayden to Louis Hermann Pammel regarding office setup at Iowa State College.
Letter from Ada Hayden to Louis Hermann Pammel describing recent botanical field work around Iowa.

1926
Photograph of Ada Hayden in the Iowa State University pasture in 1926.
Photograph of Ada Hayden in the Iowa State University pasture in 1926.
Photograph of an oatfield in a valley of the Nishnabotna River in Pottawattamie County, taken by Ada Hayden in July of 1926.
Photograph showing soil after being cultivated by a drag harrow. The soil was cultivated was done for a project with the Iowa State University Agricultural Engineering and Botany Department in March 1926.
Photograph of four cows grazing in a bare pasture in Calhoun County from July 1926. Photograph taken by Ada Hayden.
Photograph of group of people digging for potatoes in a field in East Pottawattamie County on August 20, 1926.
Photograph of pig with piglets in a pen owned by a Mr. Vogt from Pottawattamie County. Photograph taken by Ada Hayden in July 1926.
Photograph of group of people digging for potatoes in a field in East Pottawattamie County, on August 20, 1926.
Letter from Louis Hermann Pammel to Ada Hayden, asking Hayden to prepare reports on her research.
Letter from Louis Hermann Pammel to Lucia R. Briggs, recommending Ada Hayden for a position at Milwaukee-Downer College.
Letter from Lucia R. Briggs to Louis Hermann Pammel, asking for a recommendation for Ada Hayden to teach at the Milwaukee-Downer College.
Letter from Ada Hayden to Louis Hermann Pammel regarding a colleague's retirement and recent botanical work in the field.

1927
Photograph of a rodents hole in a bluegrass pasture, Northeast of Ames, taken by Ada Hayden.
Photograph of a rodents hole in a bluegrass pasture Northeast of Ames, taken by Ada Hayden in October of 1927.
Photograph of three men harvesting onions on a farm at St. Ansgar in Mitchell County. Photograph taken by Ada Hayden in July 1927.
Photograph of a herd of cows grazing in a cut over pasture East of Ames with trees in the background. Photograph taken by Ada Hayden in November of 1927.
Photograph of a curve in the Turkey River South of Clermont in Fayette County.
Photograph of a herd of cows grazing in a pasture East of Ames with trees in background. Photograph taken by Ada Hayden in November of 1927.
Photograph of three men harvesting onions on a farm at St. Ansgar in Mitchell County. Photograph taken by Ada Hayden in July 1927.

1929
Letter from Ada Hayden to Louis Hermann Pammel thanking him for his work at Iowa State College.

1932
Photograph of a bayou surrounded by grasslands two mile North of Panora, Iowa.
Photograph of a bayou surrounded by grassland two mile North of Panora, Iowa. Shows a habitat of Polygonum Coccinea.

1933
Original Forest Cover Map, Iowa State Planning Board.

1945
Prairie near Lime Springs (Howard County) (hand colored).

1946
Radio script entitled:"Native Iowa Prairie Land" that features Ada Hayden interviewed for Iowa's centennial celebration. Hayden speaks about the native prairie and the conservation of Iowa's natural resources.

1949
Report written by Ada Hayden entitled, "A Report on Some Campus Memorials." Describes the stones and plaques found across Iowa State University's campus commemorating people, sites or objects from 1949.

1950
Data reflecting quantity of plant material above and below ground in tons per acre, dry weight.

1955
Announcement naming the Iowa State University Herbarium after Ada Hayden describing the herbarium collection and Hayden's accomplishments as curator of the herbarium from 1932 until 1950.