1930 deaths

Marcel Eugène Émile Gley (French: [glɛ]; 18 January 1857 – 24 October 1930) was a French physiologist and endocrinologist born in Épinal, Vosges.
He studied physiology with Henri-Étienne Beaunis at the medical school in Nancy, and afterwards worked as an assistant to Étienne-Jules Marey (1830–1904) in Paris. Later on, he received the title of professeur agrégé, and in 1908 became a professor at the Collège de France. He was a member of the Académie de Médecine and secretary general of the Société de Biologie. He was a colleague to Charles Richet (1850–1935), and with Richet, published the Journal de physiologie et de pathologie générale. With Belgian pharmacologist Jean-François Heymans, he founded the journal Archives Internationales de Pharmacodynamie et de Thérapie (1895).In 1891 Gley was the first to discover the importance of the parathyroid glands, which are four (or more) small endocrine glands lying close or embedded in the posterior surface of the thyroid gland. These glands had been recently discovered as an anatomical entity in 1880, however their importance was not understood at the time. Gley realized that the cause of tetany after thyroid operations was the inadvertent destruction of the parathyroid glands. He demonstrated this by removing the parathyroid glands from laboratory animals and witnessing their deaths from tetany. Because of his discovery, parathyroid glands have sometimes been referred to as "Gley's glands".
In his studies of the thyroid, he discovered that there was much more iodine in thyroid tissue than in the parathyroid, and noticed that when the thyroid is removed, a disturbance of iodine metabolism occurs.

Johannes Fabry (1 June 1860, in Jülich – 29 June 1930, in Dortmund) was a German dermatologist.
He studied medicine at the universities of Bern and Berlin, receiving his doctorate in 1886. Following graduation he trained in dermatology under Joseph Doutrelepont at the University of Bonn and with Hugo Ribbert in Zürich. From 1889 to 1929 he was chief medical officer of the Skin Clinic at the Dortmund municipal hospital, which under his guidance, became a leading center for dermatology.His name is associated with "Fabry disease", a rare, inherited metabolic disease characterized by telangiectatic skin lesions, kidney failure and disorders of the cardiovascular, gastrointestinal, and central nervous systems. In 1898 he described dermatological features of the disease in a 13-year-old boy, naming the condition "purpura haemorrhagica nodularis". The disease is also called "Anderson-Fabry disease", named along with British surgeon William Anderson, who independent of Fabry, reviewed the progression of the disease over nearly 20 years in a 39-year-old patient.

Karl Wilhelm Bücher (16 February 1847, Kirberg, Hesse – 12 November 1930, Leipzig, Saxony) was a German economist, one of the founders of non-market economics, and the founder of journalism as an academic discipline.

Daniel Blumenthal (25 January 1860 in Thann, Haut-Rhin – 25 March 1930 in Paris) was the mayor of Colmar from 1905 to 1914 and an elected member of the Reichstag between 1903 and 1907. He worked as a lawyer, first at the Landgericht in Mülhausen, and then at Alsace-Lorraine's Supreme Court at Colmar.

Eugène-Charles-Joseph Silvain (17 June 1851 - 21 August 1930) was a French stage actor, pensionnaire of the Comédie française, sociétaire then dean of the compagny from 1878 to 1928.

Rose Caron (17 November 1857 – 9 April 1930) was a French operatic soprano.

André Rivoire (5 May 1872 – 19 August 1930) was a French poet and playwright whose work was defined by the delicate precision of his observation.

Thorburn Brailsford Robertson (4 March 1884 – 18 January 1930), generally known as Brailsford Robertson, was an Australian physiologist and biochemist.

Paul de Vivie, who wrote as Vélocio (April 29, 1853– February 27, 1930), was the publisher of Le Cycliste, a developer and early champion of derailleur gears, and father of French bicycle touring and randonneuring.

Giuliano M. Kremmerz (1861–1930), born Ciro Formisano, was an Italian alchemist working within the tradition of hermeticism.
In 1896, Kremmerz founded the Confraternita Terapeutica e Magica di Myriam (Therapeutic and Magic Brotherhood of Myriam).