Letter from James Winthrop to William Bentley, 1784 February 8

Two folio-sized leaves containing a two-and-a-half-page handwritten letter from Winthrop to Bentley with a lengthy discussion on a recent comet and related calculations.

Letter from James Winthrop to William Bentley, 1784 February 16

Two folio-sized leaves containing a three-page handwritten letter from Winthrop to Bentley regarding comet calculations and a short criticism of the sermons of Samuel Cooper (1725-1783).

Logical Modeling and Dynamical Analysis of Cellular Networks

The logical (or logic) formalism is increasingly used to model regulatory and signaling networks. Complementing these applications, several groups contributed various methods and tools to support the definition and analysis of logical models. After an introduction to the logical modeling framework and to several of its variants, we review here a number of recent methodological advances to ease the analysis of large and intricate networks. In particular, we survey approaches to determine model attractors and their reachability properties, to assess the dynamical impact of variations of external signals, and to consistently reduce large models. To illustrate these developments, we further consider several published logical models for two important biological processes, namely the differentiation of T helper cells and the control of mammalian cell cycle.

Stable carbon isotope record of sediment core Ancora

The standard paradigm that the Paleocene/Eocene thermal maximum (PETM) represents a threshold event intrinsic to Earth's climate and connected in some way with long-term warming has influenced interpretations of the geochemical, climate, and biological perturbations that occurred at this event. As recent high-resolution data have demonstrated that the onset of the event was geologically instantaneous, attempts to account for the event solely through endogenous mechanisms have become increasingly strained. The rapid onset of the event indicates that it was triggered by a catastrophic event which we suggest was most likely a bolide impact. We discuss features of the PETM that require explanation and argue that mechanisms that have previously been proposed either cannot explain all of these features or would require some sort of high-energy trigger. A bolide impact could provide such a trigger and, in the event of a comet impact, could contribute directly to the shape of the carbon isotope curve. We introduce a carbon cycle model that would explain the PETM by global warming following a bolide impact, leading to the oxidation of terrestrial organic carbon stores built up during the late Paleocene. Our intention is to encourage other researchers to seriously consider an impact trigger for the PETM, especially in the absence of plausible alternative mechanisms.

Choker's son /

Mode of access: Internet.

Icones opervm misericordiae cvm Ivlii Roscii Hortini sententiis et explicationibvs : pars prior eorvm qvae ad corpvs pertinent.

Numbers 53-54 omitted in paging.

The life of a chef.

Mode of access: Internet.

Méthode curative externe des douleurs rhumatismales, goutteuses, nerveuses, des maladies lymphatiques... /

Mode of access: Internet.

Publications - American Astronomical Society

Mode of access: Internet.

Babies need fathers, too.

Mode of access: Internet.

Secours a donner aux personnes empoisonées et asphyxiées... /

Mode of access: Internet.

Bulletin de la Société agricole, scientifique & littéraire des Pyrénées-Orientales. ...

"Liste des membres" in each volume; "Liste genérale des membres de la Société depuis sa fondation [1833] jusqu'en 1904," vol. 45, p. [113]-180.

Sketch of the progress of physical science. By Thomas Thomson ... Also, a course of lectures on astronomy, by Dionysius Lardner, LL.D.

"The comet of 1843": p. [92]-96.

Works of Jules Verne /

v. 9. Off on a comet. The underground city.--v. 10. Dick Sands: A captain at fifteen. The dark continent. Measuring a meridian.--v. 11. The five hundred millions of the begum. The tribulations of a Chinaman in China. The giant raft: Eight hundred leagues on the Amazon.--v. 12. The giant raft: The cryptogram. The steam house: The demon of Cawnpore. Tigers and traitors.--v. 13. The Robinson Crusoe school. The star of the south. Purchase of the North pole.--v. 14. Robur the conqueror. The master of the world. The sphinx of ice.--v. 15. The exploration of the world: The world outlined. Seekers and traders. Scientific exploration.

Andrew Johnson-- not guilty /

Mode of access: Internet.