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	Title:	Subject:	Description:

21.	Franklin & fires : his interest therein and his efforts to protect the citizens of Philadelphia from devastation : especially in relation to the Philadelphia Contributionship for the Insurance of Houses from Loss by Fire.	Franklin, Benjamin, 1706-1790. Fire prevention--History. Insurance, Fire--History.	Published in the bicentennial year of his birth, this volume describes Benjamin Franklin's numerous achievements in connection with fire. Particularly highlighted are: his role in the establishment of...

22.	Franklin and the University.	Franklin, Benjamin, 1706-1790. University of Pennsylvania.	Reprinted from the "Alumni register" of the University of Pennsylvania, of February and March, 1906, this article describes Benjamin Franklin's role as the "real founder" of the university, and as one...

23.	Frankliniana in the University library.	Franklin, Benjamin, 1706-1790. University of Pennsylvania. Library.	Reprinted from the "Alumni register" of the University of Pennsylvania, of February and March, 1906, this article consists of a numbered descriptive list of items in the university library that are related...

24.	Importance of gaining and preserving the friendship of the Indians. From: The complete works of Benjamin Franklin; including his private as well as his official and scientific correspondence, and numerous letters and documents now for the first time printed, with many others not included in any former collection, also, the unmutilated and correct version of his autobiography. Comp. and ed. by John Bigelow. New York and London, G. P. Putnam's sons, 1887-88.	United States -- History -- Colonial period, ca. 1600-1775. Indians, Treatment of -- North America. Franklin, Benjamin, 1706-1790 -- Correspondence.	In an anonymously-published letter, Benjamin Franklin declares the importance of cultivating good relations between the British colonists in North America and the Native Americans. He suggests two means...

25.	Letter : on rain, extract of a letter to Dr. Percival. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Raindrops. Hail. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin responds to a recent letter from Percival and explains his understanding of the formation of rain drops and hailstones.

26.	Letter : on ventilation, &c. written by Mr. Small, the surgeon, but containing Dr. Franklin's observations on the subject. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Ventilation -- Health aspects. Natural ventilation. Dampness in buildings. Drainage, House. Sewage -- Health aspects. Sewerage.	Dr. Small describes his own and Benjamin Franklin's concerns about inadequate ventilation of houses, hospitals, and other public buildings. Examples of poorly ventilated structures leading to disease,...

27.	Letter to a friend in Boston, 25 December 1750 : on an electrical experiment gone awry. From: The complete works of Benjamin Franklin; including his private as well as his official and scientific correspondence, and numerous letters and documents now for the first time printed, with many others not included in any former collection, also, the unmutilated and correct version of his autobiography. Comp. and ed. by John Bigelow. New York and London, G. P. Putnam's sons, 1887-88.	Electric shock -- Physiological effect. Electricity -- Early works to 1800. Electricity -- Experiments -- History -- 18th century. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin describes the physiological effects of an accidental electric shock he received when he was "about to kill a turkey by the shock from two large glass jars." Writing two nights later he...

28.	Letter to B. Vaughan, 29 April 1784 : on fire. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Fire -- Early works to 1800. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin spells out his ideas about the nature of fire. He explains that he had "long been of the opinion that it exists everywhere in the state of a subtile fluid."

29.	Letter to B. Vaughan, 31 July 1786 : on the pernicious quality of lead, colica pictorum from rain-water, &c. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Lead-poisoning -- Early works to 1800. Lead -- Environmental aspects. Lead based paint. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin discusses various aspects of lead poisoning, including occupational hazards in the printing trade, dangers from lead based paint and lead gutters in construction, and a brief survey of...

30.	Letter to David Rittenhause, 20 November 1788 : new and curious theory of light and heat. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Light -- Early works to 1800. Heat -- Early works to 1800. Fire -- Early works to 1800. Franklin, Benjamin, 1706-1790 -- Knowledge -- Physics. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin describes a theory of the interconnectedness of light, heat, and fire. All are examples of the same substance. Franklin writes that "universal space, as far as we know it, seems to be...

31.	Letter to Dr. Cooper, 7 July 1773 : stoves for public buildings. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Public buildings -- Heating and ventilation. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin writes from London about possible ways to heat a large meeting house for Sabbath services. He describes the operation of a stove, but believes that it would not be efficient enough to...

32.	Letter to Dr. Evans, 20 February 1768 : on the colica pictorum, and pernicious use of lead in distilleries. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Lead poisoning. Rum -- Early works to 1800. Wealth. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin writes from London to Dr. Evans about the use of lead tubing in rum distilleries. He draws a connection between the use of lead in that and other occupations, and disease - specifically...

33.	Letter to Dr. Ingenhausz, 16 January 1784 : on balloons, and their probable importance. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Balloons -- 18th century. Hot air balloons. Montgolfier, Jacques-Etienne, 1745-1799. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin, writing from France, describes both the hot air balloon of Montgolfier and the hydrogen ("inflammable air") balloon of Charles and Robert to Ingenhausz, who seems to have thought Franklin...

34.	Letter to Dr. Ingenhausz, 16 May 1783 : on an electrical experiment. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Electricity -- Early works to 1800. Electricity -- Experiments -- History -- 18th century. Franklin, Benjamin, 1706-1790 -- Knowledge -- Physics. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin comments on the results of an electricity experiment conducted by Ingenhausz.

35.	Letter to Dr. Ingenhausz, 2 October 1781 : on conductors of heat &c. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Thermal conductivity -- Experiments. Metals -- thermal conductivity. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin encourages Ingenhausz in his scientific pursuits. Franklin then suggests some things to try should the latter's experiments on heat transfer in wires be repeated.

36.	Letter to Dr. Ingenhausz, 28 August 1785 : on the causes and cure of smoky chimnies. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Chimneys. Dwellings -- Heating and ventilation. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin, writing from sea, describes the physics of properly operating chimneys. He explains that builders and owners of chimneys need to pay more attention to the properties of heated air than...

37.	Letter to Dr. Ingenhausz, 29 April 1785 : on electricity, a three wheeled clock, gravitation of bodies affected by sun and moon, conjecture on tides. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Electric shock. Electroconvulsive therapy -- Early works to 1800. Clocks and watches. Gravity. Tides. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin touches upon a number of subjects in this response to Ingenhausz. He includes an anecdote about himself receiving an electric shock; describes and advocates use of electric shock therapy...

38.	Letter to Dr. Percival, 15 October 1773 : moist air not unhealthy. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Moisture -- Health aspects. Cold (Disease). Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin writes to Dr. Percival and explains his belief that moist air itself is not unhealthy. He writes that it seems strange that anyone would think that it was. Describing the practice of...

39.	Letter to George Washington, 19 August 1756 : on postal service. From: The complete works of Benjamin Franklin; including his private as well as his official and scientific correspondence, and numerous letters and documents now for the first time printed, with many others not included in any former collection, also, the unmutilated and correct version of his autobiography. Comp. and ed. by John Bigelow. New York and London, G. P. Putnam's sons, 1887-88.	Postal service -- United States -- History -- Colonial period, ca. 1600-1775. Postal service -- Finance. Washington, George, 1732-1799. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin writes from Philadelphia describing the difficulties of maintaining postal service between there and George Washington's headquarters in Winchester, Virginia. He suggests that the various...

40.	Letter to John Ingenhausz : an attempt to explain the effects of lightning on the vane of the steeple of a church in Cremona, August, 1777. From: Memoirs of the life and writings of Benjamin Franklin ... / written by himself to a late period; and continued to the time of his death by the grandson, William Temple Franklin; comprising the private correspondence and public negociations [sic] of Dr. Franklin and his select political, philosophical, and miscellaneous works, published from the original mss. Second edition. London: Printed for Henry Colburn, 1818-1819.	Lightning. Lightning rods. Franklin, Benjamin, 1706-1790 -- Correspondence.	Benjamin Franklin relates the effects of a lightning strike on a church in Cremona, Italy, which he took from an Italian-language publication. He describes the general effects of lightning and describes...

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