Biomass of invertebrate bycatch on the East- and West-Greenland shelf during Walther Herwig III cruise WH379

The study on invertebrate communities in East- and West-Greenland shelf waters was embedded in a fisheries survey carried out during the 379th expedition of the German fisheries vessel Walther Herwig III of the Thünen Institute of Sea Fisheries, Hamburg, Germany. The aim of the study was a coarse classification of the bycatch comprising macrobenthic organisms. On the one hand the marine ecosystem of this area provides food for commercially valuable fish stocks and plays, potentially an important role in the remineralisation of nutrients. On the other hand it experiences stress by traditional bottom trawling as well as anthropogenic and natural climate variability. As a consequence the study can provide a baseline to detect further changes in the composition of this component of a sub-arctic marine ecosystem.

Libri de re rustica : M. Catonis, lib. I. M. Terentii Varronis lib. III. L. Iunii Moderati Columellae lib. XII. Eiusdem de arboribus liber separatus ab alijs ... Palladii lib. XIIII. De duobus dierum generibus simulq[ue] de vmbris [et] horis quae apud Pal

Lugares e imp. tomados de Short-title catalogue of books printed in the German-speaking countries and German Books printed in other countries from 1455 to 1600 now in the British Museum

Libri de re rustica : M. Catonis, lib. I. M. Terentii Varronis lib. III. L. Iunii Moderati Columellae lib. XII. Eiusdem de arboribus liber separatus ab alijs ... Palladii lib. XIIII. De duobus dierum generibus simulq[ue] de vmbris [et] horis quae apud Pal

Lugares e imp. tomados de Short-title catalogue of books printed in the German-speaking countries and German Books printed in other countries from 1455 to 1600 now in the British Museum

Biochemical evolution III: Polymerization on organophilic silica-rich surfaces, crystal–chemical modeling, formation of first cells, and geological clues

Catalysis at organophilic silica-rich surfaces of zeolites and feldspars might generate replicating biopolymers from simple chemicals supplied by meteorites, volcanic gases, and other geological sources. Crystal–chemical modeling yielded packings for amino acids neatly encapsulated in 10-ring channels of the molecular sieve silicalite-ZSM-5-(mutinaite). Calculation of binding and activation energies for catalytic assembly into polymers is progressing for a chemical composition with one catalytic Al–OH site per 25 neutral Si tetrahedral sites. Internal channel intersections and external terminations provide special stereochemical features suitable for complex organic species. Polymer migration along nano/micrometer channels of ancient weathered feldspars, plus exploitation of phosphorus and various transition metals in entrapped apatite and other microminerals, might have generated complexes of replicating catalytic biomolecules, leading to primitive cellular organisms. The first cell wall might have been an internal mineral surface, from which the cell developed a protective biological cap emerging into a nutrient-rich “soup.” Ultimately, the biological cap might have expanded into a complete cell wall, allowing mobility and colonization of energy-rich challenging environments. Electron microscopy of honeycomb channels inside weathered feldspars of the Shap granite (northwest England) has revealed modern bacteria, perhaps indicative of Archean ones. All known early rocks were metamorphosed too highly during geologic time to permit simple survival of large-pore zeolites, honeycombed feldspar, and encapsulated species. Possible microscopic clues to the proposed mineral adsorbents/catalysts are discussed for planning of systematic study of black cherts from weakly metamorphosed Archaean sediments.

Letter from William Croswell to Mrs. Bowker, 1831 May 16

Two handwritten drafts of a letter from William Croswell to Mrs. Bowker related to debts and Bowker's father.

Letter from William Croswell to landlord, 1831 December 27

Two drafts of a letter regarding Croswell's intention to break his lease due to loud noises.

III. Harvard College Papers, 1st series, Volume 3, 1785-1796

The third volume of the College Papers contains original documents dating from 1785 to 1796, spanning the tenures of president Joseph Willard and treasurer Ebenezer Storer. The series chiefly consists of incoming correspondence for Storer.

III. Harvard College Papers, 1st series, Volume 3, 1785-1796

The third volume of the College Papers contains original documents dating from 1785 to 1796, spanning the tenures of president Joseph Willard and treasurer Ebenezer Storer. The series chiefly consists of incoming correspondence for Storer.

Letters from Frederick Degen & Co. to William Tudor,

Four letters regarding trade and Tudor’s travels throughout Europe.

Letters from Frederick Degen & Co. to William Tudor,

Three letters providing updates on various commercial activities and describing the impact of renewed hostilities between England and France on trade. Included with one letter is a price circular.