This tooth is a fossil of an extinct shark species, Striatolamia macrota, from the Eocene era approximately 54 million years ago. This shark could grow to a length of about 3.5 meters (11.5 ft) and its teeth were notably big...

WHAT IS IT  These tablets may be small, but they do a world of good. When added to contaminated water, Aquatabs slowly release chlorine to reduce bacteria by 99.9999% and viruses by 99.99%—including cholera, typhoid, dysentery and other water-borne diseases....

This vintage text is in very good condition.  This text is aimed at recording data collected and the main results of hydrological studies undertaken within the framework of the Decade as well as providing information on research techniques.  VOLUME 2...

Used Condition: Very good  The result of the first series of multidisciplinary investigations of the Caribbean barrier reef complex near Carrie Bow Cay, Belize as reported in 34 papers in this volume.  Published: Smithsonian Institution; 1st Edition (January 1, 1982)...

Published in 1965It is the intention of this text to continue to regard the marine sciences with all their various facets as a unity. 

Published in 1965Library sleeve insideIt is the intention of this text to continue to regard the marine sciences with all their various facets as a unity. 

Title: Bibliography on Water and Sewage AnalysisSpecial Report No. 28Year: 1948Gently used, library pocket in front cover

Used Condition: Fair Water Hammer in Hydraulics and Wave Surges in Electricity Published: 1961 Book spine has some clear tape. Contains a library pocket. Pages are in great condition. Several fold out pages.  Bergeron, L., 1950. Du Coup de Bélier...

Practical Methods for Observing and Forecasting Ocean Waves by means of Wave Spectra and StatisticsUsedCondition: GoodPublished: 1955U.S. Navy Hydrographic OfficeContains a few stamps and library pocket. Comes with graphs in back pocket