Alpha Delta Alpha

Alpha Delta Alpha (ΑΔΑ) was an American fraternity, established in 1920. It ceased operation as a national in with at least one chapter continuing as a local organization for several years, and a second merging into another national.
History.
Alpha Delta Alpha was founded at Coe College in 1920 as a local scientific and radio society. It became a national fraternity shortly thereafter in a merger with a similar society at the University of Iowa. 
By 1923 it had shifted focus to become a general social fraternity, adding within a few years chapters at six additional regional institutions in Iowa and Indiana. 
The organization was dissolved in December 1934, at a national meeting held in Cedar Falls, Iowa. Baird's notes no national successor group, however ΑΔΑ's "Gamma chapter" at Northern Iowa was present for nine years after the national was disbanded, operating as a local fraternity according to that institution's yearbooks. Due to WWII enlistment, by 1944 all fraternity activity on the campus appears to have ceased; no fraternities are shown in the 1944 yearbook, while the sororities continued in operation. On that campus, other fraternities resumed in 1946 but these did not include Alpha Delta Alpha. 
The "Beta chapter" appears to have left by 1924, forming (or reforming) as a local for three years. Some of its members went on to join Theta Tau. 
The Tri-State (Trine) "Eta chapter?" joined Alpha Kappa Pi in 1935, which later merged into Alpha Sigma Phi.
Chapters.
Baird's Manual (20th ed.) notes the formation of eight chapters by 1932, seven of which are now dormant, while one continues as another national:
Symbols.
The badge of Alpha Delta Alpha was an equilateral triangle, one point down, having a border of 21 pearls. The inner triangle was formed of black enamel with a single pearl, a radio antenna, and the letters Α, Δ and Α. 
The fraternity's colors were red, white and purple.