|Died||June 17, 1901 (aged 53)|
|Known for||treating Robert Louis Stevenson|
Rüedi rose to fame around the world after having treated the Scottish author Robert Louis Stevenson in the winters of 1880-81 and 1881-82. Stevenson praised Rüedi in the dedication of his poetry collection Underwoods (1887) as "the good genius of the English in his frosty mountains".
Descent and childhood (1848-66)
Yet in early childhood Carl Rüedi excelled himself by physical fitness, liveliness and intelligence. At the age of four Carl hiked with his father in midsummer from Alvaneu (the family's residence) to Davos (Carl's birthplace) 23 kilometers (14 mi) away. When Carl was nine of age, he and two of his brothers who attended the cantonal school at Chur, hiked 55 kilometers (34 mi) from Chur to Davos on one day.
Years of study and first sojourn in the USA (1866-74)
Carl's elder brother Wilhelm had been living as a physician in the United States for 12 years. In 1867 Wilhelm came for a visit to his home village Zizers (Graubünden) and suggested his brothers Carl and Paul to follow him to America. Both agreed, and on December 17, 1867 they set out for Philadelphia (Pennsylvania). Paul, a trained physician, opened a doctor's office there and did not visit his homeland before 1882. (Paul (born November 19, 1844) had studied medicine at the University of Würzburg (winter of 1863-64), the University of Zürich (summer of 1864), the University of Munich (summer of 1865 – winter of 1865-66)  and the University of Tübingen (summer of 1866).) Impressed by his two brothers Carl also got interested in medicine.
After his father's death (1870) Carl returned to Zizers and took up a study of medicine at the University of Bern  in April 1870. In the summer of 1871 he changed to the University of Würzburg.
In the winter of 1871-72  and the summer of 1872  Carl Rüedi continued his study of medicine at the University of Munich. In the winter of 1872-73 he returned to the University of Bern  and prepared himself for the final exams. In the spring of 1874 he received an M.D. (Doctor of Medicine) and opened a doctor's office in the village of Seewis im Prättigau (Graubünden).
Early working years: Davos (1874-91)
On December 24, 1874 Carl Rüedi received a call as a district doctor at Davos, Europe's leading winter health resort (beside St. Moritz) in those days. Thus Rüedi held the same post as his father previously. Rüedi doctor's office was in the Rhätia hotel.
On February 26, 1875 Carl Rüedi, together with two other representatives of the Rhätia hotel, was elected into the managing committee of the newly founded health resort club. On July 30 or 31, 1875 he was additionally elected its treasurer. In 1876 Rüedi was admissioned to the Graubünden Society of Physicians (Bündner Ärzteverein)  seated in Chur.
By the growing number of tuberculosis patients coming to Davos Carl Rüedi was well off. Within few years Rüedi gained an excellent reputation among his clientele. By the end of 1878 Rüedi resigned his post of a district doctor and concentrated on his activities as a private doctor.
Rüedi's therapeutical successes were due to a combination of medical competence and the high-Alpine climate of Davos (altitude 1.560 m / 5,118 ft) with its cool, clean and dry air. Rüedi impressed by exact diagnoses, an extraordinary delicate ear when ausculating the respiratory tract and a profound knowledge of all kinds and stages of lung troubles.
Intermediate working years: Denver (1891-96)
Rüedi was so much in demand that he came to the limit of his capacity. To let his competence take effect under less exhaustive conditions he emigrated to the US by the end of April 1891 and opened a doctor's office at Denver (Colorado). Rüedi had chosen the town at the foot of the Rocky Mountains for her approximately same altitude (1,609 m / 5,279 ft) as Davos. There could be no talk, however, of similar climatic conditions, Rüedi confessed later.
In those years American pulmunologists sent well-off clients for a high-altitude therapy to sanatoriums in the Swiss Alps (Davos, St. Moritz), the Giant Mountains (Görbersdorf) or the Adirondack Mountains (Saranac Lake, New York). In the Rocky Mountains, however, there was hardly any medical infrastructure for tuberculosis patients. Apart from a sanatorium in the hamlet of Hygiene (Boulder County, Colorado) (altitude 1,553 m / 5,095 ft) which Rüedi visited in October 1891 there only existed primitive camps of covered wagons and tents or isolated pensions and hotels.
Yet in the year of his arrival in America Carl Rüedi was elected a fellow of the American Clinical and Climatological Association (ACCA). This professional organization had been founded by physicians and scientists in 1884 to improve the medical training, research and practice in the USA. In its early years the ACCA mainly aimed at treating tuberculosis patients by sojourns in a suitable climate. As a pioneer of the practical climatotherapy Rüedi was one of the main authorities for the concern of the ACCA. In 1895 Carl Rüedi held two lectures before the ACCA.
In his first lecture (A Comparison of the Winter Healthresorts in the Alps with some Places in the Rocky Mountains of Colorado ) Rüedi argued that,
due to its climate, Colorado is "entitled to compete with any of the health-resorts of the world" and has the best climatic conditions to gradually become "The Sanatorium of the United States".
Rüedi presented the vision of a climatic health resort cluster in the Rocky Mountains. Each resort would be situated at a different altitude, thus allowing pulmonologists to choose where to send their clients, depending on the stage of illness and physical constitution: From Denver and surroundings to either Colorado Springs at 6,000 ft (1,829 m), Estes Park at 7,000 ft (2.134 m) or a location at 8,000 ft (2.439 m) still to be identified by Rüedi. "This would be a health-resort (sic!) not known before".
In his second lecture (A Peep into the Future, with Respect of pathological-anatomical Researches)  Rüedi criticized the one-sided sympathy of his medical colleagues for the cytopathology. Rüedi pleaded for exploring not only the cells and tissues but also the liquid components of the human body outside the cells, in particular the blood serum, the lymph and the tissue fluid. Rüedi was convinced that analysing the blood serum would provide physicians a valuable means to forecast the „degenerations” in the cells of the respective person which are to be expected in the near future.
We must get so far that in a few drops of blood we can ascertain the state of the blood-serum (...). If as much labor had been spent on the micro-chemistry of the blood as on the microscope we would be a great deal further on in our science.
Rüedi's expectations regarding the New World, however, did not materialize. (Perhaps the medical infrastructure developed too slowly in his eyes.) For that reason Rüedi returned to Switzerland after only five years (1896).
Last working years: Arosa (1896-1901)
In his absence, however, the working conditions for physicians at Davos had changed dramatically. By the introduction of a limited number of licenses to local physicians the exercise of the medical profession had become so regulated that even a capacity like Rüedi had no chance of opening a doctor's office there.
Instead of Davos Rüedi settled in the small health resort of Arosa (altitude 1,775 m / 5,823 ft), 13 kilometres (8.1 mi) west of Davos. In the winter of 1896-97 Rüedi started to practice as a private doctor at the Grand Hotel Arosa (nowadays Robinson Club).
Regarding its development, however, the village of Arosa lay decades behind Davos. The high-altitude therapy of tuberculosis had not been introduced there before 1880 when the first hotel (Seehof) was opened. And it was not before 1888 when the first sanatorium had opened. (At this time Arosa had not more than 88 residents.)
The number of Rüedi's clients remained disappointingly low. Rüedi seriously worried about his financial income and started to commit himself in raising the attractiveness of Arosa as a health resort. On October 4, 1896 Rüedi was unanimously elected a member of the local health resort club. He regularly participated in the meetings and made numerous proposals, e.g. the erection of an artificial toboggan run. On June 22, 1897 Rüedi suggested to introduce a street lighting. In November 1900 Rüedi and four of his medical colleagues suggested to establish a scientific club. Every two weeks three academics should discuss a subject of general interest (except religion and politics) in front of a public audience.
In his sparetime Rüedi was active in organizing and timekeeping the wintertime sledge races which were first and foremost arranged for the entertainment of tourists.
Arosa's most serious impediment in development, however, was the lack of convenient transportation facilities to and from the village. In those years it took visitors several hours by stagecoach to travel the 18 kilometres (11 mi) from Chur. Carl Rüedi's greatest concern, therefore, was the improvement of the traffic connections from the Graubünden capital to Arosa.
On September 14, 1897 Rüedi and some other residents of Arosa established a commission with the objective of broadening the narrow road from Chur to Arosa. In 1900 (or shortly before) Carl Rüedi and the Graubünden Landammann (governor) Hans Brunold of Peist (1861 – 1941) submitted petitions to the Great Council (the parliament of Graubünden) and the Federal Assembly of Switzerland for the erection of an electric railway between Chur and Arosa.
Carl Rüedi, however, was not granted to witness the arrival of the first train at Arosa (December 1914). On June 17, 1901 Rüedi died unexpectedly at Arosa at the early age of 53.
- Carl was the spelling used by Rüedi himself and his contemporaries. The spelling Karl became frequent from about 1900. In the Anglo-American literature Rüedi is mostly written Carl Ruedi or Karl Ruedi.
- Student directory of the Eberhard Karls Universität Tübingen: entry #37582 "Archived copy". Archived from the original on 2009-08-05. Retrieved 2009-10-24.CS1 maint: Archived copy as title (link)
- Student directory of the University of Zürich: entry #3261 "Archived copy". Archived from the original on 2011-07-07. Retrieved 2009-10-24.CS1 maint: Archived copy as title (link). As the place of his origin the village of Filisur (Graubünden) is given there.
- Personalbestand der königlich bayerischen Julius-Maximilians-Universität Würzburg im Wintersemester 1863/64, amtlich herausgegeben, Würzburg 1864, p. 35
- Student directory of the University of Zürich: entry #2745 Archived July 7, 2011, at the Wayback Machine
- Amtliches Verzeichnis des Personals der Lehrer, Beamte and Studirenden an der königlich bayerischen Ludwig-Maximilians-Universität zu München. Sommer-Semester 1865, p. 45
- Amtliches Verzeichnis des Personals der Lehrer, Beamte and Studirenden an der königlich bayerischen Ludwig-Maximilians-Universität zu München. Wintersemester 1865/66, p. 45
- Student directory of the Eberhard Karls Universität Tübingen: entry #37583 "Archived copy". Archived from the original on 2009-08-05. Retrieved 2009-10-24.CS1 maint: Archived copy as title (link)
- Student directory of the University of Bern: entry #2426 (April 25, 1870), exmatrikulation on April 21, 1871 "Archived copy". Archived from the original on 2011-07-07. Retrieved 2009-10-24.CS1 maint: Archived copy as title (link)
- Personalbestand der königlich bayerischen Julius-Maximilians-Universität Würzburg im Sommersemester 1871; amtlich herausgegeben, Würzburg 1871, p. 36
- Amtliches Verzeichnis des Personals der Lehrer, Beamte and Studirenden an der königlich bayerischen Ludwig-Maximilians-Universität zu München. Winter-Semester 1871/72, p. 46
- Amtliches Verzeichnis des Personals der Lehrer, Beamte and Studirenden an der königlich bayerischen Ludwig-Maximilians-Universität zu München. Sommer-Semester 1872, p. 46
- Student directory of the University of Bern: entry #2742 (October 28, 1872) "Archived copy". Archived from the original on 2011-07-07. Retrieved 2009-10-24.CS1 maint: Archived copy as title (link)
- Only in 1875 virtually no English-speaking visitor had been to Davos.
- As a grown-up John studied medicine himself; cf. student directory of the University of Zürich: entry #13164 "Archived copy". Archived from the original on 2011-07-07. Retrieved 2009-10-24.CS1 maint: Archived copy as title (link).
- Rüedi C (1895). "A Comparison of the Winter Healthresorts in the Alps with some Places in the Rocky Mountains of Colorado". Transactions of the American Clinical and Climatological Association. 10: 28–42. PMC 2526879. PMID 21409069.
Both these places are at exactly the same altitude, but this is really the only point in which they resemble each other
- A. McGehee Harvey: The American Clinical and Climatological Association: 1884 – 1984, p. 49
- The elevation data is not quite exact. Rüedi “rounded” them for rhetorical reasons.
- In 1858 Rudolf Virchow had published his epochal opus „Cellularpathologie“  in which he stated that illnesses are caused by defects of the somatic cells and their functions.
- Quote: "(...) to decide what alterations in the cells have to be expected, or to give us an explanation why the different degenerations in the cells take place."
- Rüedi’s home municipality of Davos had been profiting from such a connection for ten years already.
- Davoser Blätter. Curzeitung and Fremdenliste, 20th annual vol., no. 8, February 21, 1891, p. 1; and 20th annual vol., no. 18, May 9, 1891, p 1.
- Davoser Blätter. III (30): 394 f. April 25, 1891. Missing or empty
- Visitors list of Arosa, no. 6, November 18, 1900, p 1.
- The Davos Courier. XIV (14–15). June 14, 1901. Missing or empty
- Minutes of the health resort club [von Arosa], June 23, 1901 (Manuskript); no page given.
- "Verkehrs-Organ für Ragaz, Prättigau, Davos and Engadin". Davoser Blätter. XXX annual (25). June 22, 1901.
- No author given: Allerlei von der Chur-Arosa-Bahn and ihrer Vorgeschichte; in: Abendzeitung (Arosa), December 4, 1964; no page given.
- Georges J. Capol (April 14, 1989). "Arosa – vom Hirtendorf zum Weltkurort (part 2)". Aroser Zeitung. 15: 15.
- Jules Ferdmann: Der Aufstieg von Davos; Verlag Genossenschaft Davoser Revue, 2nd edition, 1990 (1st edition, 1935).
- No author given: Dr. C. Ruedi – Arzt in Arosa (handwritten notes from the period October 4, 1896 – September 14, 1897); in the possession of the museum of local history and culture Schanfigg, Arosa.