Collection of Harvard College admission form letter and bills sent to Charles Walker and his son Charles Walker, Jr., 1785-1816

This collection consists primarily of quarter bills and butler's bills from Charles Walker and Charles Walker, Jr.'s years as students at Harvard College, from 1785 to 1789 and from 1815-1816. It includes the following materials from Charles Walker: a form of admission (a printed form letter with manuscript annotations and signatures) from August 1785, quarter bills and butler's bills from 1785 to 1789, and occasional receipts of payment. The documents from Charles Walker, Jr. are less numerous, consisting solely of quarter bills from 1815 and 1816. The bills for father and son include annotations explaining the basis of additional or unusual charges, including fines for absence from lectures and prayers. The form used for the son's quarter bills, issued in 1815 and 1816, separate the amounts owed into the following categories: Steward and Commons, Sizings, Study and Cellar Rent, Instruction, Librarian, Natural History, Episcopal Church, Books, Catalogue and Commencement Dinner, Repairs, Sweepers, Assessments for delinquency in payment of Quarter Bills, Wood, and Fines. All of the bills are printed forms which were then filled out by hand, by either the steward or the butler, and issued to the students. Caleb Gannett was the College steward during both father and son's era. Joshua Paine, William Harris, and Thomas Adams served, successively, as butler during the father's era. Some of the butler's bills are signed by Roger Vose, a student who appears to have been employed by the butler in 1786 and 1787.

The Multiple Signaling Systems Regulating Virulence in Pseudomonas aeruginosa

Cell-to-cell communication is a major process that allows bacteria to sense and coordinately react to the fluctuating conditions of the surrounding environment. In several pathogens, this process triggers the production of virulence factors and/or a switch in bacterial lifestyle that is a major determining factor in the outcome and severity of the infection. Understanding how bacteria control these signaling systems is crucial to the development of novel antimicrobial agents capable of reducing virulence while allowing the immune system of the host to clear bacterial infection, an approach likely to reduce the selective pressures for development of resistance. We provide here an up-to-date overview of the molecular basis and physiological implications of cell-to-cell signaling systems in Gram-negative bacteria, focusing on the well-studied bacterium Pseudomonas aeruginosa. All of the known cell-to-cell signaling systems in this bacterium are described, from the most-studied systems, i.e., N-acyl homoserine lactones (AHLs), the 4-quinolones, the global activator of antibiotic and cyanide synthesis (GAC), the cyclic di-GMP (c-di-GMP) and cyclic AMP (cAMP) systems, and the alarmones guanosine tetraphosphate (ppGpp) and guanosine pentaphosphate (pppGpp), to less-well-studied signaling molecules, including diketopiperazines, fatty acids (diffusible signal factor [DSF]-like factors), pyoverdine, and pyocyanin. This overview clearly illustrates that bacterial communication is far more complex than initially thought and delivers a clear distinction between signals that are quorum sensing dependent and those relying on alternative factors for their production.

Cartas fundamentales ... Ensayo de crítica epistolar con una notícia acerca del autor, de Salvador Rueda.

Imperfect? Notice concerning the author, by Salvador Rueda, wanting.

Las estancias espirituales; versos.

Mode of access: Internet.

Petroleum laws of all America /

"Publications relating to mining laws": p. 644-645.

José Martí /

"Conferencia pronunciada el 28 de junio de 1919, en el salón de actos públicos de la Universidad de Montevideo, bajo los auspicios del Centro Estudiantil 'Ariel'."

Por el camino : poesías /

Mode of access: Internet.

Paisajes criollos.

At head of title: E. Díez de Medina.

Mallcu Kaphaj [poema]

Cover title.

Plataforma electoral del Partido Colorado "General Fructuoso Rivera" : informe que la fundamenta, presentado por Carlos María Prando a la convención nacional.

Mode of access: Internet.

Letras hispanoamericanas desde la época colonial hasta nuestros días.

Mode of access: Internet.

Cantores de la provincia : florilegio de rimas primiciales /

"Proemio" by Samuel Ruiz Cabañas: p. [5]-7.

An address before the alumni of Atkinson Academy, N.H. August 25, 1859.

Mode of access: Internet.

Los aventureros; drama premiado con medalla de oro en el concurso internacional promovido por la Sociedad de autores de Colombia, con motivo del centenario de la batalla de Boyacá.

Imprint on cover: Quito-Ecuador, Imprenta nacional, 1919.