Full Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title The meaningful use of the Secchi disc /
Author Williams, Jerome.
Publisher Chesapeake Bay Institute, Johns Hopkins University,
Year Published 1968
OCLC Number 13440211
Subjects Seawater--Optical properties. ; Oceanographic instruments.
Library Call Number Additional Info Location Last
EJDD  CBI-JHU TR 45 OASQA Library/Fort Meade,MD 03/14/1997
Collation 13 pages : illustrations ; 28 cm.
Notes Includes bibliographical references (page 13).
Contents Notes The Secchi Disc is examined in terms of a target seen by the human eye under threshold contrast conditions. Results indicate that the Secchi Disc Reading is related to both the extinction coefficient and the beam transmittance coefficient. There appears to be no way to separate the two from the use of the Secchi Disc alone. In addition, if these readings are to have any meaning at all it is strongly indicated that an optical filter be placed in the system when readings are taken. Special colored glasses are suggested for this purpose.
Place Published Annapolis
Corporate Au Added Ent Chesapeake Bay Institute.
Title Ser Add Ent Technical report (Chesapeake Bay Institute) ; 45.; Reference (Chesapeake Bay Institute) ; 68-15.
PUB Date Free Form 1968
Series Title Untraced Technical report / Chesapeake Bay Institute ; 45\ Reference / Chesapeake Bay Institute ; 68-15
BIB Level m
Medium unmediated
Content text
Carrier volume
Cataloging Source OCLC/T
Merged OCLC records 33366403
OCLC Time Stamp 20170104063731
Language eng
Origin OCLC
Type CAT
OCLC Rec Leader 01998cam 2200397Ia 45010