Identity elements
Reference code
Name and location of repository
Level of description
Title
Date(s)
- 1919-2011 (Creation)
Extent
0.42 linear feet (1 document case)
Name of creator
Biographical history
Henry DeLong was born December 9, 1905, in Spink County, South Dakota. He graduated from Redfield High School in 1924. DeLong earned a Bachelor of Science degree in agriculture from South Dakota State University in 1928 and a Bachelor of Science degree in agricultural engineering in 1938. He completed a Master of Science degree in agricultural engineering at the University of Minnesota in 1941. DeLong married Mary M. Louise Franks on July 28, 1933, in Fulton, South Dakota.
DeLong’s professional career was almost entirely associated with South Dakota State University. He began as a student research assistant and advanced through the faculty ranks, retiring as professor emeritus in 1973. His responsibilities included teaching, research, and departmental administration. DeLong served as head of the department from 1946 to 1956. He was among the first agricultural engineers recognized at the Fifth Annual Distinguished Engineers Banquet at South Dakota State University. DeLong gained international recognition for his classification of rammed earth, a construction method originally developed for affordable poultry housing. He credited this work to his collaboration with R. L. Patty and Patty’s research on pisé de terre, the French term for rammed earth.
Professor Henry DeLong died on November 22, 1988, at Brookings Hospital.
Content and structure elements
Scope and content
The H. H. DeLong Papers are comprised of research, publications, and professional activity related to rammed earth construction, with a strong focus on agricultural and rural building applications. Materials include bulletins, circulars, extension publications, engineering data, research reports, manuals, and bibliographies dating from 1919 to 1988, with some later contextual material through 2011. The publications were issued by land grant universities, federal and state agencies, international organizations, and research institutions, including South Dakota State College, the United States Department of Agriculture, Texas A and M University, the University of California, and the United Nations. Subjects addressed include soil composition, construction techniques, structural performance, building finishes, housing design, and applications of rammed earth and related earthen building methods such as adobe, cob, and pisé de terre. The collection also includes news articles highlighting rammed earth projects and public interest in the method. Biographical materials related to Henry Herbert DeLong are present, including clippings, honors, obituary material, a curriculum vitae, and portrait photographs, documenting his professional career and recognition for contributions to agricultural engineering and rammed earth research.
The collection provides documentation of twentieth century research and practical guidance on rammed earth construction in agricultural and rural contexts, reflecting the role of land grant institutions and government agencies in promoting cost effective and locally sourced building materials. The inclusion of publications authored by or associated with Henry Herbert DeLong documents his contributions to the development and dissemination of rammed earth construction methods and their application in the United States. The materials support research in agricultural engineering, sustainable building practices, rural housing, and the history of earthen construction technologies.
System of arrangement
Conditions of access and use elements
Conditions governing access
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Materials in this collection may be subject to Title 17, Section 108 of the United States Copyright Act. Users are responsible for ensuring compliance with copyright, privacy, trademark, and other applicable rights for their intended use. Obtaining all necessary permissions is the user's responsibility. Written authorization from the copyright and/or other rights holders is required for publication, distribution, or any use of protected materials beyond what is permitted under fair use. .sdstate.edu/sdsu-archives-and-special-collections/researcher-registration-form)
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Physical access
Technical access
Conditions governing reproduction
Reproduction of materials from the collection is subject to the following conditions:
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Languages of the material
English
Scripts of the material
Language and script notes
Finding aids
Acquisition and appraisal elements
Custodial history
Immediate source of acquisition
Appraisal, destruction and scheduling information
Accruals
Related materials elements
Existence and location of originals
Existence and location of copies
Related archival materials
Related descriptions
Notes element
General note
Copyright and Use Statement
In Copyright This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses, you need to obtain permission from the rights-holder(s).
Materials in this collection may be subject to Title 17, Section 108 of the United States Copyright Act. Users are responsible for ensuring compliance with copyright, privacy, trademark, and other applicable rights for their intended use. Obtaining all necessary permissions is the user's responsibility. Written authorization from the copyright and/or other rights holders is required for publication, distribution, or any use of protected materials beyond what is permitted under fair use.
Specialized notes
Alternative identifier(s)
Description control element
Rules or conventions
Sources used
Access points
Subject access points
Place access points
Name access points
- DeLong, H.H. (Henry Herbert) (Subject)