Guide to Advertised ProductsIn addition to the products advertised in this issue, the following items have been featured recently. Science provides this
list to afJord readers a further opportunity to receive information on these books, instruments, materials, and services.Scan the list and circle the Readers' Service numbers for those of interest. Use the card on either page 662A or page662C. To see the original advertisements, refer to the issue and page of Science indicated.
Product and Source Issue Page Circle Product and Source Issue Page Circle
Absorbance MonitorsISCO
Acid Digestion BombsParr Instrument
Amino Acid AnalysisEldex Laboratories
Anemometers, Laser DopplerDisa Electronics
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BalancesCahn Instruments 4130Mettler Instrument 4134Ohaus Scale 4134Sartorius 4133Sauter 4135
Baths, Constant TemperatureGCA/Precision Scientific 4134Haake 4130
Bibliographic ServicesBIOSlS 4130Chemical Abstracts Service 4133
BiochemicalsBio-Rad Laboratories 4130
4134Collaborative Research 4130Merck 4130
Biofeedback ApparatusCyborg 4135
Biology, Chemistry and Geology CatalogWard's Natural Science Establishment 4133
BlendersWaring Products 4135
Books, Comprehensive VirologyPlenum 4133
Books, EnergyAcademic Press 4134Halsted Press 4134
Books, EnvironmentPlenum 4134
Books, Fusion and Plasma PhysicsAcademic Press 4134
Books, Geology, Geophysics andNatural ResourcesAcademic Press 4134
Books, Madness and the BrainMcGraw-Hill 4134
Books, Nuclear ScienceAcademic Press 4134
Books, Politics of OilUniversity of Chicago Press 4134
Calculators, ProgrammableComputer Design 4130Hewlett-Packard 4130
4135Mlonroe 4134
Calculators, Programmable, Demonstration ofHewlett-Packard 4130
CalorimetersParr Instrument 4134
CamerasPolaroid 4130
4134Cameras, Immunodiffusion
Cordis Laboratories 4134Cell Culture Apparatus
VirTis 4135Cells, Glass
Hellma Cells 4133Centrifuges
Beckman Spinco 413041334134
Damon/IEC 4130DuPont Instruments-Sorvall 4135SGA Scientific 4130Vemitron Medical Products 4133
Chemical Analyzers, Automated, ClinicalUnion Carbide 4135
4135Chemicals, Combustion and Radloanalysis
Packard Instrument 4133
714
416
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Chromatographic ColumnsReeve Angel
Chromatography ReagentsBio-Rad Laboratories
Circulators, Controlled TemperatureGCA/Precision ScientificHaake
Clinical Reagent KitsBMC
Colony CountersLab-Line InstrumentsNew Brunswick
Column Chromatography Systems LiteraturePharmacia Fine Chemicals
Communications Transmission SystemsWestern Electric
Computers, Analog/HybridElectronic Associates
Computers, DigitalData General
Contact Angle AnalyzersImass
Coverings, Laboratory FurnitureNalge
Coulometry CellsMcKee-Pedersen
Critical Point Drying ApparatusBomarDuPont Instruments-Sorvall
Dala Acquisition SystemsGould
Density Gradient Centrifugation ChemicalsEM Laboratories
Diagnostic Kits, ClinicalDiagnostic Products
Differential Thermal Analysis LiteratureFisher Scientific
Duplicators, PhotographicBogen Photo
Electricity, CoalGeneratedAmerican Electric Power
Electrolytic AnalyzersSargent-Welch
Electron MicroscopesPhilips Electronic InstrumentsCarl Zeiss
Electronic InstrumentsHeath/Schlumberger
Electrophoresis ApparatusBio-Rad LaboratoriesE-C ApparatusHoefer Scientific InstrumentsSavant Instruments
Electrophoresis ReagentsBio-Rad LaboratoriesE-C Apparatus
EnzymesEM LaboratoriesMiles LaboratoriesWorthington Biochemical
Fermentors, MiniatureLKB Instruments
Filter PaperSchleicher & Schuell
Filter ProductsMillipore
Filters, ElectronicSpectrum Scientific
Filtration MembranesNuclepore
Fourier Transform AnalyzersHoneywell Signal Analysis
Fraction ColiectorsBuchler InstrumentsISCO
Gilson Medical Electronics
4135
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SCIENCE, VOL. 184
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Proteinase K isWhen you need another Available only from
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Issi',L , Cirele Product and SourProduct and Scurce
Freezersoiirnia. Sci nulliftkIiniiritrR VV('()
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1 hronIth the Ce(neCOsits ot the late Ar-t hruL FBcIItle theic A A.i oftl ers Ia IIIannnl pirLize of1 1GOP)(Itfor aimentorioLns paper that f nrthler-s uindcrstanidlnof theC pChchoo'iaFlsocial cnltrral hehas w1 ot hnL-man heinitsThe .AAXAS Soro 1Ssc hological Pr-izc is initenided
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Eritr ies sliould lircscit a cormilpleted ialySsis otf a
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Issue Page Circle Product and Source
Microscope Systems, Modular,Demonstration ofBausch & Lomb
MicroscopesAmerican OpticalNikonSwift InstrumetitsUnitron Instrument-Wild Heerbrugg
Microscopes, FluorescenceAmerican Optical
Microscopes, MeasuringUniton. Instrument
Microscopes, PhotographicCarl Zeiss
Notebooks, Water RepellentNalge
Nucleotide AnalogsSchwarz/Mann
pH MetersLondonOrion ResearchPhotovoltSargent-Welch
PhotometersPhoenix PrecisionSSR Instruments
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Plhotomicrographic CamerasAmerican Optical
Photomultiplier TubesGencom-Emitronics
Pipettes, MicroVolumetrics
Pipettes, RepeatingMedical Laboratory AtitomationOxford LaboratoriesRainin InstrumentVolumetrics
PolarographsSargent-Welch
PotentiostatsBrinkmann Instruments
Power SuppliesLambda Electronics
Publishing ServicesVantage Press
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Pumps, PeristalticPharmacia Fine Chemicals
Pumps, Peristaltic, MeteringBuchler Instruments
Pumps, Sampling, NonreactiveScience Pump
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Radioimmunoassay Equipment, Gamma CountersPackard Instrument 4133
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-70CUltra-Cold.-.960CX -Ultra-oler.Both from Kelvinator Commer-cial. Upright drops to -76°C.Ultra-cold. Chest model dipsto -96°C. Ultra-colder. Up-right's six French doors openindividually. And you canlabel each door to know what'sinside. Easy labeling for what'sunder the chest's stainless steel ' -sliding lids, too. Want more?Automatic alarm systems? 2"portholes for recorders? TheKelvinator Commercial name?You got them. Don't be caughtin the cold without ultra-cold. \Contact J. E. Hirssig at Kelvinator\-Commercial, the company that knowshow to give you 12 cubic feet of the best cold you ever had:Upright UC-105 (-760C/-105'F) Chest UC-520 (-85°C/-120°F)Chest UC-540 (-96°C/-140°F)
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One of the White Consolidated Industries
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Anacon 4130Modules, Solid State for Instruments
Coulbotirn Instruments 4130
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DOI: 10.1126/science.184.4137.714 (4137), 714-718.184Science
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