CaCO3, organic carbon, and nitrogen at DSDP Hole 93-603B

Contents of organic carbon and carbonate carbon were determined on the same set of Cretaceous samples from DSDP Hole 603B in three different laboratories in order to assess the degree of comparability of organic carbon and carbonate values obtained by different labs using the same or different methods. We report the results of analyses for organic carbon using two different CHN analyzers, LECO, and Rock-Eval II and for carbonate carbon by CHN (total C minus C after acidification), the carbonate bomb technique, and CaCO3 calculated on the basis of total calcium obtained from X-ray fluorescence and induction-coupled plasma techniques. In addition, total nitrogen was obtained by two different labs using a CHN analyzer, but different bases for calculation were used. The various techniques for organic carbon analysis yielded comparable results, with the exception of those obtained by one of the CHN analyses of acid-treated samples. The calculation of organic carbon values and comparison on a whole-rock basis is very sensitive to errors in determination of carbonate contents, and this factor explains most, but not all, of the disparities between the data sets. The carbonate bomb technique gives CaCO3 values that correspond well with those calculated from total calcium concentrations (XRF and ICP analyses), whereas the CaCO3 calculated from CHN total carbon minus acid-soluble carbon consistently overestimated CaCO3. Total nitrogen and C/N results from the two different CHN analyses are not comparable and are subject to more error than the factor related to error in estimation of CaCO3.

(Table T3) Granulometry of sediments from ODP Leg 190 sites

We present the results of grain-size analysis performed on hemipelagic sediment from Sites 1173, 1174, 1175, and 1177 at the Nankai Trough. Analyses of the <63-µm fraction were performed with a laser particle counter, and results were converted to equivalent settling diameters by means of an empirical regression with data from pipette analysis. The relations among grain size, porosity, bulk density, void ratio, and moisture content are influenced by the increasing compaction of sediment with depth as well as facies changes. Thus, departures of bulk density and porosity from normal compaction trends cannot be attributed to grain size on the basis of our laboratory results.

Hu

Metalwork, Chinese, Song; H: 1 ft. 1/8 in.; cast and punched bronze

Reliquary Casket with Scenes from the Martyrdom of Saint Thomas Becket

2 11/64 in.x 1 27/32 in.; gilded silver with niello and a glass cabochon set over a tinted foil

Reliquary Casket with Scenes from the Martyrdom of Saint Thomas Becket

2 11/64 in.x 1 27/32 in.; gilded silver with niello and a glass cabochon set over a tinted foil

The method of characteristics in compressible flow.

Reproduced from typewritten copy.

Memoria de las aguas minerales sulfo-carbonatadas-alcalino-ferreas de Horcajo de Lucena, correspondiente al año de 1868 /

Incluye cuadros estadísticos.

Sum[m]a diuersarum questionum medicinaliu[m] per ordine[m] alphabeti collectaru[m] Per magistru[m] Gabrielem de Taregua ... Aggregatio eiusde[m] de curis quaru[m]da[m] egritudinu[m] ... Textus Auicen[n]e per ordinem alphabeti in sente[n]tia per eundem reportatus ...

Mode of access: Internet.

[Medicinae practicae libri tres]

Mode of access: Internet.

Historia del Viejo y Nuevo Testamento /

Aguilar, III, 1263.