To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

John Dix Fisher

From Wikipedia, the free encyclopedia

Portrait of John Dix Fisher by his brother, artist Alvan Fisher (ca.1840)

John Dix Fisher (March 27, 1797 – March 3, 1850) was a physician and founder of Perkins Institution for the Blind in Boston, Massachusetts. He is credited with introducing the stethoscope into the United States and was an early advocate for the practice of mediate auscultation. He discovered what was called "cephalic bellows-sound" or "cerebral murmur", a phenomenon related to cerebral circulation which was thought to be a physical symptom of diseases of the brain. He was a founding member of the American Statistical Association.

YouTube Encyclopedic

  • 1/1
    Views:
    19 102 637
  • Anti-Gravity Wheel?

Transcription

I am here at the University of Sydney where the mechanical engineering shop has built this incredible piece of apparatus for me. It is a forty pound, that is nineteen kilogram flywheel on the end of a meter long shaft. Can you imagine trying to hold this out horizontally with just one hand at this end? It is virtually... it is impossible, ok? No I'm going to let go. You going to be able to hold this at all? I hope so. Can you lift it out? Make it horizontal - hold it, hold it, hold it. Come on. Just try to - I want you to hold it out horizontal. See if you can. Hold it, hold it! Ahh, come on! No. What I'm going to do is I am going to spin this up to a few thousand RPM and then I'm going to attempt just that, to hold it from one end and have it out horizontally. Five, four, three, two, one. Boom. I'm going to let go with my left hand. What you'll see is that the shaft remains horizontal, see it going around there. It almost looks as though the wheel is weightless. How does this work? Well instead of pulling the wheel down to the ground as you'd expect, the weight of the wheel creates a torque which pushes it around in a circle. You may recognise this as gyroscopic precession. For a more detailed explanation, click the annotation, or the link in the description to see my video on the topic. Here I want to try something more extreme. I'm going to try to lift it over my head with one hand while it's spinning. Wish me luck. But before I make the attempt, Rod wisely suggests that I first check if I can lift the wheel above my head without it spinning. OK, let's prove that I could lift it, just this end, without it spinning. Here we go. agggh I mean it's just kind of awkward with the hand. Careful! Ah, che Careful! Ha Oooohhh Just barely. Oh goodness, do you even lift? Clearly I do not. Undaunted by my lack of strength, I'm going for it, but I want to make sure the wheel is spinning as fast as possible to give me the best chance of success. Give it ten more seconds. Ten, nine, eight, seven, six, five, four, three, two, one. Pull! Go. That was perfect. Now I'm going to release my left hand and holding only with my right hand at the end of the shaft, I'll try to lift it up over my head. This is a forty pound, nineteen kilogram flywheel. Ready? Here we go: three, two, one. Beautiful! Let's go again in three, two, one. Nice! Smooth. Three, two, one. It feels incredibly, incredibly light as I do that. When you said it felt incredibly light, yeah you mean when you're lifting it feels light? Yeah. It shouldn't! I know. Hahahaha Honestly, I have lifted it up with one hand when it's not spinning. Yeah. And it feels really hard to lift it up, like it's a big effort. Yeah. But with this, when it's spinning it honestly felt like it was just... wanting to go up by itself. Yes. It felt like I was not struggling like I was not putting in the amount of force that you'd think to lift that kind of weight. I bet if you let it go, it'd crash down to the ground. It's not weightless! We can't do that though. We can't do that part of the experiment. What we could maybe do is I could stand on a scale and we could see what the weight of me plus that apparatus does, while I'm lifting it up over my head, see if I get lighter in essence. You can see that just my weight is about 72 kilograms. Now when I pick up the flywheel it goes up to about 91 kilograms, which makes sense because the flywheel itself is about 19 kilos, that's about 42 pounds. Now we're going to spin it up and I want you to make a prediction. As I'm lifting it over my head, do you think the scale reading will be more, less than, or equal to 91 kilograms. What do you think? You can make your prediction by clicking on one of the on-screen annotations or if you're on mobile you can click a link in the description. Five, four, three, two, one.

Early life

John Dix Fisher was born in Needham, Massachusetts, the youngest of the six sons of Aaron and Lucy (Stedman) Fisher. The Fisher family was descended from Anthony Fisher, one of the signers of the Dedham Covenant in 1636. All six sons were self-made men who became successful merchants, traders and professional men in Dedham and Boston, Massachusetts.[citation needed]

With the support of his older brothers, Fisher entered Brown University, graduating in 1820. After receiving his M.D. degree in 1825 from what was then called Massachusetts Medical College of Harvard University, he immediately accompanied his brother, the artist Alvan Fisher, on a trip to Europe. In Paris, he pursued his professional studies with such eminent physicians of the period as René Laennec, inventor of the stethoscope; Gabriel An l, distinguished pathologist; and Alfred Velpeau, renowned for his knowledge of surgical anatomy.

Career

In medical school, Fisher had studied with James Jackson, Harvard's first professor of clinical medicine and one of the "fathers" of Massachusetts General Hospital. Jackson had touched on the difficulties of distinguishing smallpox from other eruptive diseases and the need for a series of colored pictures that would illustrate the progress of the disease. Fisher undertook such a project while in Paris and wrote Description of the Distinct, Confluent, and Inoculated Small Pox, Varioloid Disease, Cow Pox, and Chicken Pox (1829) which included thirteen colored plates. The paintings from which the plates were made were executed under Fisher's direction by a French artist working at the bedside of the patients during 1825 and 1826 when smallpox was an epidemic in Paris.[citation needed]

Fisher also observed the methods of instructing the blind that were being practiced in Paris. He visited the world's first school for blind children, L'Institution Nationale des Jeunes Aveugles, founded by Valentin Haüy in 1784. He was impressed with how students were taught to read from raised-type books, to write, and to learn mathematics, geography, languages, music, and manual arts. Inspired, he returned to Boston and spent the next three years persuading family and friends who had both the means and the conscience to help fund an American version of the Paris school. The Massachusetts legislature eventually signed an act incorporating the New England Asylum for the Blind on March 2, 1829, and soon after provided $6,000 of funding. The trustees searched for two years for a superintendent for the new school until, in 1831, Fisher recruited his friend, Samuel Gridley Howe. The two men had studied together at Brown University and Harvard Medical School. Howe opened the school in the summer of 1832 using an approach that gave students both the ability to think and the skills to support themselves to turn out independent, productive, well-educated members of society. Fisher continued as the school's doctor and vice president. The school's name was eventually changed to Perkins School for the Blind and is now located in Watertown, Massachusetts.[citation needed]

Fisher was a pioneer for medical reform in Boston. He is credited with introducing the stethoscope into the United States and was an early advocate for the practice of mediate auscultation—listening to the body through a stethoscope—using the techniques that he had learned during his studies in Paris with Laënnec. In July 1832, while using auscultation to examine a child affected with chronic hy cephalus, he discovered what was called "cephalic bellows-sound" or "cerebral murmur", a phenomenon related to cerebral circulation which was thought to be a physical symptom of diseases of the brain.[1] His findings were circulated in medical journals throughout the world. However, the phenomenon was dismissed in 1880 as being without pathological significance.

He was among those present in the Ether Dome at Massachusetts General Hospital when ether was first used in public for a surgical operation, described by many as the most significant event in American medical history. He was one of the first to use ether during childbirth. Although Antoine Jean Desormeaux, a French surgeon, first introduced the endoscope to a patient and is considered the Father of Endoscopy, Fisher had several years earlier described an endoscope initially to inspect the vagina, but later modified it to examine the bladder and urethra.[2]

As one of a group of young American doctors influenced by the teachings of another French physician, Pierre Louis, Fisher was an advocate of the "numerical method" in the United States, where the emphasis on the collection of observable, detailed data and their statistical analysis became a guideline for medical research and the foundation for epidemiology.[3] He was present along with William Cogswell, Richard Fletcher, Oliver Peabody, and Lemuel Shattuck at a meeting held on November 17, 1839, in which the American Statistical Association (ASA) was formed. These men were graduates of Brown, Dartmouth, and Harvard and were trained in law, medicine, theology, literature, and education. The constitution of the Society set out as its aims: "...to collect, preserve, and diffuse statistical information in the different departments of human knowledge."[4] It was particularly instrumental in improving public health and encouraging advances in preventive medicine.

He was also a member of the Massachusetts Medical Society which, in concert with the ASA in 1842, led the effort to establish the first statewide system to collect and publish vital statistics in the United States. In 1846, Fisher was elected attending physician at Massachusetts General Hospital, a position he held until his death on March 3, 1850, at his home in Hayward Place, Boston. On March 17, 1850, the hospital's Board of Trustees expressed its deep regret for "...the loss of an officer who, to high scientific attainments, united amiable and unassuming manners and the greatest kindness of heart; one who has uniformly discharged in a most zealous, faithful, and acceptable manner his duties toward this institution."[5]

Honors

A white marble monument in his memory stands in Mount Auburn Cemetery, Cambridge, Massachusetts.

Trivia

According to an extract from Flashes of Light from the Spirit-Land compiled by Allen Putnam and published in 1872 by William White & Co., Boston, Mrs. J. H Conant was an American medium who, through the generosity of Luther Colby, editor of The Banner of Light, (a weekly subtitled "An Exponent of the Spiritual Philosophy of the Nineteenth Century," which had the largest circulation of any spiritualist paper in the world) gave, for the last 17 years of her life, free public séances in Boston. Her trance messages, characterized by the impersonation of the departed, were published weekly in The Banner. Mrs. Conant was known in spiritualist circles as both an inspirational speaker and a platform healer. For her medical diagnosis, the medium relied on the spirit of John Dix Fisher, a famous old Boston physician.[6]

Further reading

  • Fisher, Philip A.: Fisher Genealogy (1878) pp. 275–277
  • French, Kimberly: Perkins School for the Blind (2004) pp. 9–11
  • French, Kimberly: "The Man Who Would Change Everything", Brown Alumni Magazine, May–June 2007
  • Gitter, Elizabeth: The Imprisoned Guest:Samuel Howe and Laura Bridgman, the Original Deaf-Blind Girl (2004) pp. 23–26
  • Kelly, Howard A., M.D.:A Cyclopedia of American Medical Biography from 1610 to 1910, vol. 1 (1912) pp. 305–306
  • The North American Medical and Surgical Journal, by Kappa Lambda Association of the United States (1829) pp. 175–177, Article XV

References

  1. ^ Wood, George B., M.D., A Treatise on the Practice of Medicine, vol. 2, J. B. Lippincott & Co., Philadelphia (1833) pp. 654-655.
  2. ^ "History of Minimally Invasive Surgery". Archived from the original on 2007-06-29. Retrieved 2007-08-05.
  3. ^ Osler, William, M.D., F.R.S., The Influence of Louis on American Medicine in An Alabama Student and Other Biographical Essays, Oxford University Press American Branch, New York (1908) pp. 198-199.
  4. ^ American Quarterly Register, published by The American Education Society, vol.XIII (1841) p. 451
  5. ^ Bowditch, Nathaniel I., A History of the Massachusetts General Hospital (To August 5, 1851), (1851) pp. 361-362.
  6. ^ Day, John W., Biography of Mrs. J. H. Conant, the World's Medium of the Nineteenth Century, William White and Company, Boston (1873)

External links

This page was last edited on 26 March 2024, at 00:35
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.