Letter from Josiah Quincy to Francis Sales, 1835 October 12

Brief one-page handwritten letter to Francis Sales from Harvard President Josiah Quincy that accompanied the diploma for Sales's honorary master's degree.

Letter from Francis Sales, 1848 March 30

Handwritten copy of a brief letter in French presumably to Francois Arago congratulating him on his appointment in the French Provisional Government following the 1848 Revolution and the formation of the French Second Republic. Both Arago and Sales were from the Pyrénées-Orientales region of France.

Letter from Francis Sales to Dominique-Francois Arago, 1849 October 1

Three-and-a-half page handwritten copy of a letter in French from Francis Sales to Francois Arago on two folio-sized leaves. The letter begins with a short sketch of Sales's life and appears to be written to Arago in relation to his role as a political leader in the French Republic.

Letter from James Walker to Francis Sales, 1852 January 30

One-page handwritten letter from James Walker, in his capacity as a member of the Harvard Corporation, responding to Sales's letter of resignation due to health problems.

Autobiographical sketch of Francis Sales, 1853

Three-page handwritten draft of a biographical sketch of Francis Sales from his birth to immediately following his arrival in the United States. There is a penciled note on the last page: "Life of my father written by himself in 1853" presumably written by Mary Catherine Sales.

Copy of the Corporation vote regarding the death of Francis Sales, 1854 February 25

One-page handwritten copy of the Harvard Corporation vote of condolence following the death of Francis Sales.

Letter: to Francis Nicholson, [17--]

Letter, undated, from committee of eight members of the Church of England in Boston, John Barnes, Thomas Greaves, Anthony Blount, John Gibbins, George Cradock, Thomas Selbey and two others, appealing to Nicholson to help support the founding and building of Christ Church.

Receipt book of Francis Kittredge, 1780

Contains instructions for preparing and administering medicine for adults and children, and generalized uses for certain ingredients, written by Dr. Francis Kittredge. Preparations include ointment for scurvy, bone ointment, nerve ointments, procedures to soothe a sore mouth and to stop excessive bleeding, and treatment to kill worms. The materials used to prepare bone ointment include fresh butter, hog fat, chamomile, garlic, and night shade, among other ingredients. The recipe for “simple nerve ointment” instructs the preparer to simmer half a pint of neet foot oil, a pint of rum, and one jell of oil of turpentine over a “gentle fire.” Kittredge writes that oil of St. John’s Wort is effective in treating swelling of the legs, for cold and aches, and for burning and scalds, while oil of Elderflower is indicated for belly aches. The manuscript is housed in a binding created by the Harvard Medical School library. Tipped into the binding is one letter from Frederick O. West, M.D., Harvard Medical School, Boston, Massachusetts, that accompanied his donation of the Kittredge receipt book to the library in 1919. There is also one letter of unknown provenance enclosed with the receipt book, which contains an inventory of the estate of Antipas Brigham, of Grafton, Massachusetts, signed by Worcester County Judge Joseph Wilder on 7 November 1749. It is unclear if this letter has any connection to Frederick O. West or Francis Kittredge.

Wind Shear, Gust, and Yaw-Induced Dynamic Stall on Wind-Turbine Blades

This study examined the effect of a spanwise angle of attack gradient on the growth and stability of a dynamic stall vortex in a rotating system. It was found that a spanwise angle of attack gradient induces a corresponding spanwise vorticity gradient, which, in combination with spanwise flow, results in a redistribution of circulation along the blade. Specifically, when modelling the angle of attack gradient experienced by a wind turbine at the 30% span position during a gust event, the spanwise vorticity gradient was aligned such that circulation was transported from areas of high circulation to areas of low circulation, increasing the local dynamic stall vortex growth rate, which corresponds to an increase in the lift coefficient, and a decrease in the local vortex stability at this point. Reversing the relative alignment of the spanwise vorticity gradient and spanwise flow results in circulation transport from areas of low circulation generation to areas of high circulation generation, acting to reduce local circulation and stabilise the vortex. This circulation redistribution behaviour describes a mechanism by which the fluctuating loads on a wind turbine are magnified, which is detrimental to turbine lifetime and performance. Therefore, an understanding of this phenomenon has the potential to facilitate optimised wind turbine design.