SCIENTISTS

       Benjamin Franklin

The American author, politician, scientist, inventor, civic activist, statesman, soldier, and diplomat, Benjamin Franklin was indeed a man of multiple talents. He was also one of the significant Founding Fathers of the United States who for later generations served as both a spokesman and a model for the national character. As a scientist, he was one of the prominent figures in the American Enlightenment and the history of physics for his findings and theories regarding electricity. His inventions include: the lightning rod, bifocals, the Franklin stove, a carriage odometer, and the glass ‘armonica’. He devoted most of his life towards the development of his people and left an ineffaceable mark on the emerging nation.

Early Years of Life:

Franklin was born in Boston, Massachusetts on January 17, 1706. He was the fifteenth child of Josiah Franklin, candlemaker and a skillful mechanic and Abiah Folger (Josiah’s second wife). He received his primary education from Boston Latin School. At the age of ten he left school because of the poor financial conditions of his family and continued his education through voracious reading. When he was twelve was apprenticed to his older brother James, a printer who taught him the printing trade. Franklin always wanted to be independent and hated being ordered about so he ran away to Philadelphia, Pennsylvania when he was seventeen. There he established his own printing office in partnership with Hugh Meredith in 1728.

Life as a Scientist:

Benjamin Franklin was an extraordinary scientist and inventor. His creations that received a lot of recognition include: lightning rod, glass armonica (a glass instrument, not to be confused with the metal harmonica), Franklin stove, bifocal glasses and the flexible urinary catheter. His inventions also comprised of social innovations, such as paying forward. All his efforts towards science were directed towards enhancing competence and bringing human improvement. One such improvement was his effort to expedite news services through his printing presses.

Electricity
Franklin began his investigations on electricity and was the first person to discover he principle of conservation of charge. He also conducted his famous kite experiment, in which he flew a kite with the wire attached to a key during a thunderstorm. From this experiment he further established that laboratory-produced static electricity was similar to a previously unexplained and frightening natural phenomenon.

Wave Theory of Light
Franklin was among the very few scientists who greatly supported the Christiaan Huygens’ wave theory of light. This theory was later proved to be true after experiments performed by other scientists in the 18th century.

Meteorology
Franklin also noted the behavior of winds and he found out storms do not always travel in the direction of the prevailing wind. This concept gained a great significance in meteorology.

Heat Conductivity
Franklin also conducted his experiments on the non-conduction of ice which received a great acceptance by other popular scientists such as Michael Faraday.

DEATH:

At the age of eighty-four this famous personality died on April 17, 1790 and was buried at Christ Church Burial Ground in Philadelphia.

Franklin was a true philosopher who was interested in all facets of the natural world. He learned through his own experimentation and his conversation with those who shared his interests.

Rosalind Elsie Franklin

Rosalind Elsie Franklin (25 July 1920 – 16 April 1958) was a British biophysicist and X-ray crystallographer who made critical contributions to the understanding of the fine molecular structures of DNA (deoxyribonucleic acid), RNA, viruses, coal, and graphite. Her DNA work achieved the most fame because DNA plays an essential role in cell metabolism and genetics, and the discovery of its structure helped her co-workers understand how genetic information is passed from parents to their offspring.

Franklin is best known for her work on the X-ray diffraction images of DNA which led to the discovery of the DNA double helix. According to Francis Crick, her data was key to determining the structure to formulate Crick and Watson's 1953 model regarding the structure of DNA. Franklin's images of X-ray diffraction confirming the helical structure of DNA were shown to Watson without her approval or knowledge. This image provided valuable insight into the DNA structure, but Franklin's scientific contributions to the discovery of the double helix are often overlooked.

Unpublished drafts of her papers (written just as she was arranging to leave King's College London) show that she had independently determined the overall B-form of the DNA helix and the location of the phosphate groups on the outside of the structure. Moreover, it was a report of Franklin's that convinced Crick and Watson that the backbones had to be on the outside, which was crucial since before this both they and Linus Pauling had independently generated non-illuminating models with the chains inside and the bases pointing outwards. However, her work was published third, in the series of three DNA Nature articles, led by the paper of Watson and Crick which only hinted at her contribution to their hypothesis. Watson has suggested that ideally Franklin would have been awarded the Nobel Prize in Chemistry, along with Maurice Wilkins.

After finishing her portion of the work on DNA, Franklin led pioneering work on the tobacco mosaic virus and the polio virus. She died in 1958 at the age of 37 of ovarian cancer.