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Christine Ladd-Franklin

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342:. Ladd-Franklin often wrote of the injustice she observed in the oppression of the female sex. In one such journal entry while at Vassar College she describes her disappointment with the views in society about and among women, stating, "I so despise the idea that women are not as competent to take care of themselves as men, that they cannot decide for themselves when to go to bed and when to get up, how much exercise to take, how much to pray and go to church. Still my greatest objection is to the class of girls who come here and to the social and political atmosphere of the place...I know of but one girl who declares herself for the rights of women" (September 22, 1866). In another journal entry she writes about the lack of recognition of women who have earned advanced educational degrees, "That is the case with our clever girls -- they go to Germany and get the parchments, beautifully signed and sealed, that proclaim them to be doctors of philosophy, but no further consequences follow. They have nothing but the empty satisfaction of exhibiting their 'tickets 326:
decision to marry." Eleven years later, in 1904, she was at last given permission to teach one class per year. For the next five years her position at Johns Hopkins University had to be approved and renewed on a yearly basis. Women who were able to obtain academic positions in universities at this time often chose these positions despite their lack of compensation. Ladd was no different. Many of the teaching positions that she held were on a volunteer basis, creating substantial financial strain on her and her family. Yet, it is evident that Ladd placed a high value on her ability to earn the academic affiliations necessary to become a successful contributor to her field.
276:. Ladd's application for a fellowship was signed "C. Ladd", and the university offered her the position without realizing she was a woman. When they did realize her gender, the board tried to revoke the offer, but Sylvester insisted that Ladd should be his student, and so she was. She held a fellowship at Johns Hopkins University for three years, but the trustees did not allow her name to be printed in circulars with those of other fellows, for fear of setting a precedent. Furthermore, dissension over her continued presence forced one of the original trustees to resign. 322:. Since women were not allowed to graduate from Johns Hopkins University at that time, Ladd was refused a PhD in mathematics and logic, although she was the first woman to complete all the university's requirements for a PhD. Completing the work for a PhD in mathematics and logic at Johns Hopkins University gave her the tools and the legitimacy she needed, as a woman taking up scientific work. The university eventually officially awarded her a PhD during its 50th-anniversary celebrations in 1926 (44 years after she had earned it) when she was seventy-eight. 42: 311: 168:, New Hampshire, where she attended school. Ladd's father remarried in 1862 and had two further children, her half-sister Katherine (born 1862) and half-brother George (born 1867). Ladd was reportedly a precocious child who sought to find "a mean to continue her education beyond secondary school." Her father enrolled her in a two-year program at the coeducational 194:
In the fall of 1866 Ladd enrolled in Vassar College financed by a loan from her aunt, Juliet Niles, but left at the end of the spring term due to financial hardship. Ladd then worked as a public school teacher until her aunt's aid allowed her to re-enroll in Vassar. She earned an A.B. degree in 1869.
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In 1893, she applied for a teaching position at Johns Hopkins University, but was denied. Laurel Furumoto, in her work discussing the sociopolitical environment of the time, notes that Ladd's "inability to secure a regular academic position was a predictable consequence, in that time period, of her
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One of the major contributions that Ladd-Franklin made to psychology was her theory of color vision, which was based on evolution. Ladd-Franklin noted that: "some animals are color blind and assumed that achromatic vision appeared first in evolution and color vision came later." She assumed further
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and mathematics. Because women in nineteenth-century America were prohibited from working in physics laboratories, Ladd chose to study mathematics. Later in life, Ladd would reflected her decision, saying, "had it not been for the impossibility, in those days, in the case of women, of obtaining
283:, at first Ladd was only allowed to attend classes taught by Sylvester. However, after displaying exceptional work in his courses, Ladd was allowed to take courses with additional professors. Even though she was awarded a stipend, she was not allowed to have the title of " 361:, where she carried out experimental work on vision. Although women in academic settings and laboratories were viewed as equally unwelcome as in the United States, she managed to secure a position. Ladd-Franklin was also able to work in the laboratory of 960:
Furumoto, L. (1994). Christine Ladd-Franklin's color theory: Strategy for claiming scientific authority? In. Adler, H.E. & Rieber, R.W. (Eds.) Aspects of the history of psychology in America: 1892-1992 (pp. 91-100). New York: The New York Academy of
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Ladd-Franklin concluded that color vision evolved in three stages: achromatic vision (black and white), blue-yellow sensitivity and red-green sensitivity. Since red-green sensitivity was the last to evolve it explains why many people suffer from
1153:. Includes an English translation "Christine Ladd Franklin: American Mathematician and her influence on symbolic logic" of the paper "Cristina Ladd Franklin. Matemática americana y su influencia en la lógica simbólica" by Prósper published in 234:; Massachusetts; and New York for nine years, although her diary entries indicate that her interest in teaching may have diminished over time. During this time, Ladd contributed seventy-seven mathematical problems and solutions to the 149:. In 1853 the family moved back to Windsor, Connecticut, where her sister Jane Augusta Ladd McCordia was born the following year. Family correspondence shows that Augusta and one of her sisters were both staunch supporters of 338:
on August 24, 1882, she adopted the name Christine Ladd-Franklin. The couple had two children, one of whom died in infancy. The other, Margaret Ladd-Franklin, became a prominent member in the
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and strove to inspire women to gain more self-confidence to enter into the male-dominated academia of the time. Under the guidance of Mitchell, Ladd became proficient and developed a love for
291:, who has been called the first American experimental psychologist. She wrote a dissertation "On the Algebra of Logic" with Peirce as her thesis advisor. The dissertation was published in 1149:
Nubiola, Jaime and Cobo, Jesús (2000), "The Spanish Mathematician Ventura Reyes Prósper and His Connections with Charles S. Peirce and Christine Ladd-Franklin", Arisbe, Lubbock, TX.
427:. She was also the first woman to receive a Ph.D. in mathematics and logic. The majority of her publications were based on visual processes and logic. Her views on logic influenced 1353: 1313: 484:
during 1901-1902 and 1914-1915. Ladd-Franklin remained a member of both scientific societies until her death. She was also a prominent member of the women's rights movement.
365:, where she attended his lectures on theory of color vision. After attending these lectures, Ladd-Franklin developed her own theory of color vision. In 1929 she published 936: 1323: 1318: 1308: 1363: 394:) was more primitive than foveal vision (provided by the cones of the retina) because night vision and movement detection are crucial for survival." 157:, a well-known proponent of women's rights. Additionally, her father was a graduate professor who was supportive of his eldest daughter's education. 1333: 1182: 339: 318:
Due to her studies with Sylvester and Peirce, Ladd became the first American woman to formally receive graduate instruction in both mathematics and
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that the human eye carries fragments of its earlier evolutionary development. She observed that the most highly evolved part of the eye is the
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Spillman, Scott, "Institutional Limits: Christine Ladd-Franklin, Fellowships, and American Women's Academic Careers, 1880–1920,"
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in December 1893. From 1894 to 1925, Ladd-Franklin presented ten papers at APA meetings. She was also the first woman member of
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Cadwallader, J. V.; Cadwallader, T.C. (1990). "Christine Ladd-Franklin (1847-1930)". In O'Connell, A. N.; Russo, N. F. (eds.).
552: 252: 1328: 203:, who was famous for having been "the first woman to discover a new comet, using a telescope, in 1847". Mitchell was also a 526: 1188: 648: 536: 1041: 1303: 1211: 1192: 620: 231: 411:. Since achromatic vision was the first to evolve it explains why the majority of the population are not affected by 176:. At Wesleyan Academy she took the same courses her male classmates took to prepare for entrance to colleges such as 1093:
Furumoto, L (December 1994). "Christine Ladd-Franklin's color theory: strategy for claiming scientific authority?".
1174: 495:, and was surprised that there were no others. Coming from a logician and a solipsist, her surprise surprised me." 452: 169: 165: 491:
wrote: "I once received a letter from an eminent logician, Mrs. Christine Ladd-Franklin, saying that she was a
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Niles) Ladd. During her early childhood, she lived with her parents and younger brother Henry (born 1850) in
480: 382:, where, at least in daylight, visual acuity and color sensitivity are greatest. Ladd-Franklin assumed that 1072:
Furumoto, Laurel (1992). "Joining Separate Spheres: Christine Ladd-Franklin, Woman-Scientist (1847–1930)".
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Furumoto, Laurel (1992). "Joining separate spheres: Christine Ladd-Franklin, woman-scientist (1847-1930)".
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Russell, B. (1948). Human Knowledge: Its Scope and Limits. New York: Simon and Schuster. p. 180.
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Christine Ladd, sometimes known by the nickname "Kitty", was born on December 1, 1847, in
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After graduating from Vassar, Ladd taught science and mathematics at secondary level in
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Supplementary Material For Pioneering Women In American Mathematics: The Pre-1940 PhD's
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Peirce's Ph.D. student Christine Ladd-Franklin found the truth table in
892:"Christine Ladd-Franklin - Vassar College Encyclopedia - Vassar College" 720:
Untold lives : the first generation of american women psychologists
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After leaving Hopkins, Ladd-Franklin worked with German psychologist
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This article incorporates material from Christine Ladd-Franklin on
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Pioneering Women in American Mathematics — The Pre-1940 PhD's
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Women's Intellectual Contributions to the Study of Mind and Society
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VIIIth International Congress of Psychology: Proceedings and Papers
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Ladd-Franklin was the first woman to have a published paper in the
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While attending Vassar, Ladd began working under the mentorship of
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Verhandlungen des III. Internationalen Kongresses fur Philosophie.
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access to laboratory facilities" she would have studied physics.
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Hurvich, Dorothea Jameson (1975), "Ladd-Franklin, Christine"
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The Journal of Philosophy, Psychology, and Scientific Methods
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v. 4, n. 6, pp. 172–4 (Nov 1877). Google Books
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as the five women part of the first Optica Fellow class.
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Psychology's Feminist Voices Multimedia Internet Archive
608:, pp. 64–670, 1908. Also separately as an offprint. 568:, C. S. Peirce, ed., pp. 17–71, 1883. Google Books 1187:. History of Mathematics. Vol. 34 (1st ed.). 1168:
Notable Women in Mathematics, a Biographical Dictionary
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Proposition 5.101, 40 years earlier than Wittgenstein.
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from Wesleyan Academy and pursued further education at
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Christine Ladd (1881), "On the Algebra of Logic", p.62
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The Analyst: A Journal of Pure and Applied Mathematics
141:, Connecticut, to Eliphalet, a merchant, and Augusta ( 287:". During 1879 and 1880, Ladd took classes taught by 164:, Ladd went to live with her paternal grandmother in 583:, v. 1, n. 1 pp. 99–111, November 1887. JSTOR 443:
Ladd-Franklin was among the first women to join the
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Following the death of her mother in spring 1860 of
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Women in Psychology: A Bio-bibliographic Sourcebook
615:v. 13, n. 26, 715–723, December 1916. Google Books 589:"On Some Characteristics of Symbolic Logic" in the 295:(C.S. Peirce, ed.) in 1883. In 1884, Ladd attended 94: 79: 65: 51: 32: 808:. New York, NY: Greenwood Press. pp. 220–225. 717: 407:. The next one that affects a small population is 716:Scarborough, Elizabeth; Furumoto, Laurel (1989). 349:She died on March 5, 1930 in New York, New York. 215:In 1887, Vassar College awarded Ladd an honorary 1231:Creative Commons Attribution/Share-Alike License 27:American psychologist and logician (1847 - 1930) 799: 797: 795: 971: 969: 967: 793: 791: 789: 787: 785: 783: 781: 779: 777: 775: 711: 709: 707: 705: 8: 978:An introduction to the history of psychology 1244:The Christine Ladd-Franklin Diary 1866–1873 1354:20th-century American women mathematicians 1314:19th-century American women mathematicians 747: 745: 678: 676: 674: 672: 670: 668: 666: 664: 40: 29: 724:. New York: Columbia Univ Press. p.  907: 905: 903: 901: 821: 819: 817: 815: 279:Since the university did not approve of 660: 611:"Charles Peirce at the Johns Hopkins", 1324:19th-century American women scientists 862:Encyclopedia of World Biography Online 373:Ladd-Franklin's theory of color vision 372: 7: 1319:20th-century American mathematicians 1309:19th-century American mathematicians 1282:American Academy of Arts and Letters 1024:"An Early Start for Women in Optics" 828:"Profile of Christine Ladd-Franklin" 531:(Several journals have been called " 431:logic and she was highly praised by 353:Major contributions and achievements 1364:20th-century American psychologists 604:"Epistemology for the logician" in 1253:Profile of Christine Ladd-Franklin 1120:10.1111/j.1749-6632.1994.tb27502.x 478:Ladd-Franklin was included in the 445:American Psychological Association 244:. She also published six items in 25: 297:William Thomson, 1st Baron Kelvin 264:In 1878, Ladd was accepted into 1334:Johns Hopkins University alumni 1278:about the lack of women in the 547:, should use the search phrase 253:American Journal of Mathematics 1229:, which is licensed under the 1162:History of Education Quarterly 1002:Tractatus Logico-Philosophicus 627: 591:American Journal of Psychology 581:American Journal of Psychology 558:will dominate search results.) 1: 1210:Green, Judy; Laduke, Jeanne, 1189:American Mathematical Society 638:, Routledge, 320 pages, 1929. 562:"On the Algebra of Logic" in 1299:American women psychologists 832:Psychology's Feminist Voices 649:Timeline of women in science 537:The Analyst (disambiguation) 330:Personal life and philosophy 303:and met her future husband, 1193:London Mathematical Society 1028:Optics & Photonics News 413:black-white color blindness 409:blue-yellow color blindness 232:Hollidaysburg, Pennsylvania 191:, supported by her family. 1380: 1268:Christine Ladd Franklin's 1262:. In A. Rutherford (Ed.), 1086:10.1037/0003-066x.47.2.175 766:10.1037/0003-066x.47.2.175 636:Colour and Colour Theories 453:Optical Society of America 183:In 1865 Ladd graduated as 976:Hergenhahn, B.R. (2009). 914:"Christine Ladd-Franklin" 858:"Christine Ladd-Franklin" 685:"Christine Ladd-Franklin" 549:"The Analyst" mathematics 545:The Annals of Mathematics 405:red-green color blindness 340:women's suffrage movement 108: 87: 39: 1359:American women logicians 1012:, C. S. Peirce ed., 1883 539:. Internet searches for 527:"Quaternions" first page 457:Charlotte Moore Sitterly 439:Professional involvement 367:Color and Color Theories 266:Johns Hopkins University 228:Washington, Pennsylvania 174:Wilbraham, Massachusetts 133:Early life and education 1164:52 (May 2012), 196–221. 543:, the one which became 314:Christine Ladd-Franklin 115:Christine Ladd-Franklin 69:March 5, 1930 (aged 82) 46:Christine Ladd-Franklin 34:Christine Ladd-Franklin 18:Christine Ladd Franklin 1339:Charles Sanders Peirce 1155:El Progreso Matemático 1144:Notable American Women 398:Stages of color vision 315: 289:Charles Sanders Peirce 1329:Vassar College alumni 1157:, 12 (1891), 297–300. 1096:Ann. N. Y. Acad. Sci. 1074:American Psychologist 916:. Agnes Scott College 754:American Psychologist 419:Mathematics and logic 363:Hermann von Helmholtz 313: 155:Elizabeth Oakes Smith 683:Ragsdale, Samantha. 481:Who's Who in America 59:Windsor, Connecticut 1112:1994NYASA.727...91F 1102:(1 Aspects of th). 941:Scientific American 617:Eprint (badly done) 597:. Internet Archive 572:. Internet Archive 429:Charles S. Peirce's 1304:American logicians 1275:The New York Times 1258:2018-09-25 at the 1219:, pp. 338–346 334:After marriage to 316: 270:James J. Sylvester 260:Graduate education 1285: 1202:978-0-8218-4376-5 461:Dorothy Nickerson 386:(provided by the 384:peripheral vision 274:Educational Times 268:with the help of 250:and three in the 237:Educational Times 112: 111: 89:Scientific career 16:(Redirected from 1371: 1279: 1220: 1218: 1206: 1139: 1089: 1059: 1056: 1050: 1049: 1042:"Optica Fellows" 1038: 1032: 1031: 1019: 1013: 1010:Studies in Logic 998: 992: 991: 973: 962: 958: 952: 951: 949: 947: 932: 926: 925: 923: 921: 909: 896: 895: 888: 873: 872: 870: 868: 854: 848: 847: 845: 843: 838:on 22 April 2019 834:. 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Index

Christine Ladd Franklin

Windsor, Connecticut
New York City
Logic
psychology
psychologist
logician
mathematician
Windsor
née
New York City
women's rights
Elizabeth Oakes Smith
pneumonia
Portsmouth
Wesleyan Academy
Wilbraham, Massachusetts
Harvard
valedictorian
Vassar College
astronomy
Maria Mitchell
suffragette
physics
LL.D.
Washington, Pennsylvania
Hollidaysburg, Pennsylvania
Educational Times
London

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