[1] In 1889, he published an article on the thermal conductivity of mixtures of ethyl alcohol and water in the scientific journal, Annalen der Physik.
[1] As a young man, he was drawn to photography, beginning by constructing a camera from an opera glass lens housed in a cigar box.
[10] That year, the club arranged the premiere International Exhibition of Artistic Photography, where several English pictorialists were featured for the first time in Vienna.
[12] Hugo Henneberg made an appearance at an exhibition of the Salzburg Amateur Club in the Marble Hall of the Mirabell Palace in June 1893.
His entries in the exhibition catalogue, including "Sailing Ship," "Still Waters," "Autumn Evening," and "Villa Floridiana near Naples," were praised for their atmospheric quality, scenic beauty, and the skillful execution of each photograph.
[16] That year, the Linked Ring Brotherhood featured Henneberg's artworks in their 1894 Photographic Salon at the Dudley Gallery in the Egyptian Hall, Piccadilly, London.
[22] Hugo Henneberg published an article titled "The Gum Bichromate Process" in the March 1896 issue of the Wiener Photographische Blätter.
[23] By 1896, the trio of Henneberg, Kühn, and Watzek formed the 'Vienesse Trifolium,' or 'The Clover Leaf' (German: Das Kleeblatt), a subset of the Vienna Camera Club.
[24] The three internationally known photographers traveled together to northern and southern Germany, to Italy and Holland and engaged in photography and collective exhibitions.
[27] In January 1897, Henneberg did a German translation of an article by Demachy for Wiener Photographische Blätter, the periodical of the Vienna Camera Club.
His work titled "Italian Villa in Autumn" was said to resemble the style of a Böcklin chalk drawing rather than a traditional photograph.
Henneberg's prints were similar to oil underpaintings, prioritizing color over form, featuring "Baltic Sea Beach," "Old Cypress," and "Motif at Stillfried.
[37] At the 8th Exhibition of the Vienna Secession in late 1900, Henneberg bought a smoker's cabinet by Charles Rennie Mackintosh for his nearly completed Hoffman-designed house.