978 resultados para State Library of Massachusetts


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24

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We present a library of Penn State Fiber Optic Echelle (FOE) observations of a sample of field stars with spectral types F to M and luminosity classes V to I. The spectral coverage is from 3800 to 10000 Å with a nominal resolving power of 12,000. These spectra include many of the spectral lines most widely used as optical and near-infrared indicators of chromospheric activity such as the Balmer lines (Hα to H epsilon), Ca II H & K, the Mg I b triplet, Na I D_1, D_2, He I D_3, and Ca II IRT lines. There are also a large number of photospheric lines, which can also be affected by chromospheric activity, and temperature-sensitive photospheric features such as TiO bands. The spectra have been compiled with the goal of providing a set of standards observed at medium resolution. We have extensively used such data for the study of active chromosphere stars by applying a spectral subtraction technique. However, the data set presented here can also be utilized in a wide variety of ways ranging from radial velocity templates to study of variable stars and stellar population synthesis. This library can also be used for spectral classification purposes and determination of atmospheric parameters (T_eff, log g, [Fe/H]). A digital version of all the fully reduced spectra is available via ftp and the World Wide Web (WWW) in FITS format.

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7 (1904 - 1909)

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Original pen and ink drawn plan for Massachusetts Hall drawn circa 1718. Includes floor plan and measurements for second and third floors. Detailed notes describe measurements for each room, entryway, and chimney on verso.

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Includes estimate from Walton & Moore for adding another storey to Massachusetts Hall, replacing the roof, replacing glass, and painting the interior.

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In this letter signed by President John Kirkland, the Corporation voted to honor Loammi Baldwin for his supervision of the repairs to Massachusetts Hall. Repairs included new doors, doorframes, and windows. These updates were likely delayed repairs of damage sustained during the American Revolution when American soldiers were quartered in Massachusetts Hall.