ANALYTICAL APPROACH J. D.; Ulrich, D. R., Eds.; Wiley: New York, 1987; pp. 819-25. (13) Coûtant, J. Ε.; Robinson, R. S. In Analysis of Silicones; Smith, A. L., Ed.; Krieger: Malabor, FL, 1988; pp. 325-48. (14) Wheeler, G. The Chemistry of Four Alkoxysilanes and Their Potential for Use as Stone Consolidants; University Micro films: Ann Arbor, MI, 1987; pp. 98-104.
Alan Schein received a B.S. degree from Brooklyn College. He is a science journal ist and a technical communications con sultant focusing on analytical, environ mental, and biological applications.
George Segan Wheeler received a B.A. de gree from Muhlenberg College (PA), an M.A. degree in art history from Hunter College (NY), and an M.A. degree and a Ph.D. from the chemistry department at New York University. He is also the recip ient of a Certificate in Conservation from the New York University Conservation Center. In 1979 he joined the staff at the Metropolitan Museum of Art, where his research focuses on the preservation of stone sculpture, monuments, and build ings.
S. H. Su received a B.S. degree from Na tional Taiwan Normal University and a Ph.D. from Michigan State University, and joined the staff at Union Carbide in 1981. Her research interests lie in the area of organo-functional silanes.
C. Scott Black well received a B.S. degree from the University of North Carolina, Chapel Hill, and a Ph.D. from MIT. His work centers on NMR spectroscopy.
Gretchen Shearer received a Ph.D. in ar chaeology from the University College of Ijondon. She was an L. W. Frolich Fellow at the Metropolitan Museum of An before moving to the University of Iowa, where she is working on analytical chemistry ap plications in enzymology.
MISTRAL Full range HPLC temperature control, exact and reproducible at elevated and subambient temperatures (4-90°C). By Spark's new column thermostat Mistral. Peltier technique is used for comfortable column cooling, high air velocities for efficient heat exchange between column and air. Stable column temperature: Mistral. Compatible with most HPLC systems.
Spark Holland INSTRUMENTS FOR HPLC RO. Box 388. 7800 A] Emmen, The Netherlands Tel.(31)5910-3 1700, Fax. (31)5910-30035 CIRCLE 129 ON READER SERVICE CARD
356 A · ANALYTICAL CHEMISTRY, VOL. 64, NO. 5, MARCH 1, 1992
