After an introduction which addresses some basic questions, this article is organized around three points: The theoretical framework of the so-called « instrumental approach » which has been a theme in the last

Priscilla White studied the treatment of diabetes in mothers, pregnant women, and children during the twentieth century in the United States. White began working with children with Type 1 diabetes in 1924 at Elliott Proctor Joslin?s practice in Boston, Massachusetts. Type 1 diabetes is an incurable disease where the pancreas produces little to no insulin. Insulin is a hormone [2] that allows th...

We present a complete inventory of the historical Strasbourg seismograms housed at École et Observatoire des Sciences de la Terre (EOST), University Strasbourg, France. Although published seismological records date back to 1892, station was officially created in 1900, with structure specifically built for monitoring. The presence highly motivated and active scientists from outset, along unique ...

(1) Department of Virology, Faculty of Veterinary Sciences, National University of La Plata, 60 & 118, CC296, 1900 La Plata, Buenos Aires, Argentina (2) CICV-INTA, CC77, 1708 Morón, Buenos Aires, Argentina (3) National Research Council (CONICET), Av. Rivadavia 1917, C1033 AAJ, Buenos Aires, Argentina (4) Professional Assistant of the Scientific Research Commission (CIC), 10 & 526, 1900 La Plata...

Joseph Needham [4] was an embryologist and biochemist who is most noted in science for his studies on induction [5] in developing embryos. Needham worked with Conrad Hal Waddington [6] to attempt to identify the compound responsible for the organizer?s activity. Although he was not successful in discovering the chemical, he and Waddington learned much about the organizer [7]. Needham was a meti...

O. Martı́nez Matos, G. A. Torchia, G. M. Bilmes, and J. O. Tocho Centro de Investigaciones Ópticas-CIOp(CONICET CIC), CC 124, 1900 La Plata, Argentina Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900 La Plata, Argentina Facultad de Ingenierı́a, Universidad Nacional de La Plata, 1 y 47, 1900 La Plata, Argentina ~Received 27 June 2003; revised manuscript received 13 Fe...

In 1920, F.A. entered Harvard Medical School, and graduated in 1924. He then worked as an intern at the Massachusetts General Hospital (M.G.H.) in the Department of Dr. J. Aub and W. Bauer where he was initiated into the field of the parathyroid glands and calcium metabolism. In 1927 and 1928, at Johns Hopkins Hospital in Baltimore, Albright together with Dr. R. Ellsworth studied and published ...

Viktor Hamburger [5] was an embryologist who focused on neural development [6]. His scientific career stretched from the early 1920s as a student of Hans Spemann [7] to the late 1980s at Washington University [8] resolving the role of nerve growth factor [9] in the life of neurons. Hamburger is noted for his systematic approach to science and a strict attention to detail. Throughout his life he...