Question: Peter Collinson (January 1694 – 11 August 1768) was a Fellow of the Royal Society, an avid gardener, and the middleman for an international exchange of scientific ideas in mid-18th century London, best known for his horticultural friendship with John Bartram, was an early American botanist, horticulturist and explorer, that died on which date?

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Jane Douglas: Jane Douglas (c. 1700 – 10 June 1761) commonly known as Mother Douglas, was a brothel-keeper in mid-18th century London.  Known at the time as "The Empress of the Bawds", her house in Covent Garden attracted customers from the higher echelons of society.

Peter Edwards (chemist): Peter Philip Edwards FRSC FRS (born 1949, Liverpool) is Professor of Inorganic Chemistry and former Head of Inorganic Chemistry at the University of Oxford and a Fellow of St Catherine's College, Oxford.  Edwards is the recipient of the Corday-Morgan Medal (1985), the Tilden Lectureship (1993–94) and Liversidge Award (1999) of the Royal Society of Chemistry.  He was elected a Fellow of the Royal Society in 1996 and was awarded the 2003 Hughes Medal of the Royal Society "for his distinguished work as a solid state chemist.  He has made seminal contributions to fields including superconductivity and the behaviour of metal nanoparticles, and has greatly advanced our understanding of the phenomenology of the metal-insulator transition".  In 2009 Edwards was elected to the German Academy of Sciences Leopoldina, and he was elected Einstein Professor for 2011 by the Chinese Academy of Sciences.  In 2012 he was awarded the Bakerian Lecture by the Royal Society "in recognition of decisive contributions to the physics, chemistry and materials science of condensed matter, including work on the metal-insulator transition".  In the spring of 2012 he was elected International Member of the American Philosophical Society; one of only four people from the UK in that year to be awarded this honour across all subjects and disciplines.  Later in 2012 he was awarded the Worshipful Company of Armourers and Brasiers Materials Science Venture Prize for his work on new, low-cost, high-performance conducting oxide coatings for solar cells and optoelectronic materials.  In the Autumn of 2013 he was elected Member of Academia Europaea, and he was elected as a Foreign Honorary Member of the American Academy of Arts and Sciences in 2014.

Peter Collinson (botanist): Peter Collinson (January 1694 – 11 August 1768) was a Fellow of the Royal Society, an avid gardener, and the middleman for an international exchange of scientific ideas in mid-18th century London.  He is best known for his horticultural friendship with John Bartram and his correspondence with Benjamin Franklin about electricity.

Mary Fanton Roberts: Mary Fanton Roberts (1864–1956) was an American journalist and writer.  She was best known as an editor of women's and decorating magazines.  During her long career she was editor of the illustrated monthly "Demorest’s", editor-in-chief of "New Idea Woman’s Magazine", managing editor of the "The Craftsman", and creator and editor of "The Touchstone" and "Decorative Arts" magazine.  She often wrote articles on the topic of decorative arts and home decorating, and published two books, "Inside 100 Homes" and "101 Ideas for Successful Interiors".  She was also an avid gardener.  She occasionally wrote criticism under the pen name, Giles Edgerton.

Ambroise Verschaffelt: Ambroise Colette Alexandre Verschaffelt (11 December 1825 – 16 May 1886) was a distinguished Belgian horticulturist and author.  His grandfather Pierre-Antoine (1964-1844) was amongst the founders of the "Floralies gantoises" in 1808.  His father Alexandre (1801-1850) was a major horticulturist of his city.  The Verschaffelts were a family of Belgian nurserymen specializing a.o. in camellia, azalea, palmtrees.  They introduced many new species from abroad - in particular from South America - collected for them by "plant hunters".  They published the "Nouvelle Iconographie des Camellias" (1848-1860) : it continues Lorenzo Berlèse’s work "Iconographie du genre Camellia".  In 1854, Ambroise took over from Charles Lemaire "Le Jardin Fleuriste" which became "L'Illustration Horticole" in 1858.  Ambroise sold his business to Jean Linden (1817-1899) in 1869, together with "L'Illustration Horticole".  He then retired but continued to be active on the botanical scene an acted at different occasions as a counselor to king Léopld II for his famous hothouses of Laeken.  Ambroise was vice-president of the Royal Society for Agriculture and Botany of Gent; he obtained numerous medals and prizes in horticultural exhibitions in his own country as well as in the United Kingdom (Cheltenham 1853, London 1861), Russia (St.-Petersburg 1869) and other countries.

John Bartram: John Bartram (March 23, 1699 – September 22, 1777) was an early American botanist, horticulturist and explorer.  Carl Linnaeus said he was the "greatest natural botanist in the world."

Experiments and Observations on Electricity: The book came about through the activities of scientists at the Royal Society of London.  Franklin sent letters to members of the Society about his experiments on electricity and the observations he had made.  Most of these letters went to Peter Collinson.  Some of these were read at the society's meetings.  There was much interest shown, so some of them were sent to a printer to be published in a magazine.  Public interest in Franklin's letters about electricity led the Society to gather together many of the letters to Collinson from Franklin over a two-year period and send them to the printer for publication.  This first collection of letters was published in a ninety-page pamphlet in 1751.  It was soon followed by other parts that were "Supplemental" to the existing edition and eventually a "New" publication was sold from the total of all the "Parts" produced.  Each edition expanded by additional Franklin letters being added.  It ultimately became a 496-page volume by 1769.  The book inspired others to follow in Franklin's footsteps to do further in-depth research on electricity.

Collinsonia: Collinsonia is a genus of flowering plants in the family Lamiaceae.  It is native to East Asia and eastern North America.  It was named for the English botanist Peter Collinson (1694–1768) by Carl Linnaeus in "Species Plantarum" in 1753.  It is in the tribe Elsholtzieae, a small tribe of only 5 genera.  In order of their number of species, they are "Elsholtzia", "Mosla", "Collinsonia", "Perilla", and "Perillula".

Walter Gardiner: Walter Gardiner, FLS, FRS (1 September 1859 – 31 August 1941) was a British botanist.  He was educated at Bedford School and at Clare College, Cambridge, and was a Fellow there and Lecturer in Botany at the University.  He was a Fellow of the Linnean Society of London, and was elected a Fellow of the Royal Society in 1890.  He was awarded the Royal Society's Royal Medal in 1898: ""For his researches on the protoplasmic connection of the cells of vegetable tissues and on the minute histology of plants.""

Jane Colden: Jane Colden (March 27, 1724 – March 10, 1766) was an American botanist, described as the "first botanist of her sex in her country" by Asa Gray in 1843.  Although not acknowledged in botanical publications, she wrote a number of letters resulting in botanist John Ellis writing to Carl Linnaeus of her work applying the Linnaean system of plant identification to American flora, "she deserves to be celebrated".  Contemporary scholarship maintains that she was the first female botanist working in America.  She was regarded as a respected botanist by many prominent botanists such as: John Bartram, Peter Collinson, Alexander Garden, and Carl Linnaeus.  Colden is most famous for her manuscript which remains titleless, in which she describes the flora of the New York area, and draws ink drawings of 340 different species of them.

Supporting paragraphs: Peter Collinson (botanist) John Bartram
Answer: September 22, 1777