Click here to download the catalog as a PDF file. To view this site you need Adobe Flash Player and your browser must allow javaScripts. Go here to get the latest Flash Player. Measurement Density Rod Set Use this discrepant event to test students’ understanding of density, buoyancy, and thermal expansion! The set consists of two rods. The aluminum rod floats in cool water and sinks in warm. The PVC rod does the reverse — sinks in cool and floats in warm. Try it, scratch your head, and use science to figure it out! Explanation included, just in case. P1-1020 Density Rod Set $19 Large Demonstration Spring Scale, 20Nx1/2N NEW! Perfect for Ohaus Demonstration demos or group Spring Scales have large explorations. faceplates for easy viewing. They’re a versatile addition to your classroom, perfect for demonstrations in physics or physical science. 20 Newton or 50 Newton capacity, 21 cm diameter. P1-1102 P1-1103 Large Demonstration Spring Scale, 20Nx1/2N Large Demonstration Spring Scale, 50Nx2N $39 $42 USB Digital Microscope SUBSCRIBE TO Don’t waste days of precious class time! CoolStuff! The FREE newsletter from Arbor Scientific full of teaching ideas, lesson plans, demo ideas and free downloads. Why spend so much class time learning microscope care and operation, when your students really want to view specimens? This digital camera and LED illuminator is built into a small, compact package that weighs just three ounces. View and capture images (or even video clips!) at 20x or 200x power on a PC or laptop with the attached USB cable. Several students can view specimens simultaneously on screen, and even save files to share later. This microscope can be used in virtually every area that a traditional microscope is used, without the lengthy training sessions. Requires Windows 98SE/ME/2000, XP and VISTA, Pentium IV 1.8 GHz or higher processor, 256 MB RAM, 32 MB Video Memory, USB port: 2.0 and a CD-ROM Drive. C1-4028 USB Digital Microscope 6 or more $139 $129 Actual computer screen capture of a coin using the 200x power setting. Sturdy, multi position microscope stand allows for hands-free use! Density Blocks Equal volume set. One cube each of aluminum, brass, copper, iron, lead, and zinc. 20 mm cubes in storage box. P1-1010 Density Blocks Set 10 or more $19.95 $19 Not just for biology! Examine crystals, study surface properties, analyze color prints, and more. No moving parts to wear out or carbon disks to replace. Electronic Spark Timer Measure Motion Clearly and Accurately This solidly built, fully electronic spark timer provides two different spark timing rates of 10 or 60 Hz. Measuring just 90 x 97 x 37 mm, it lends itself perfectly to both bench-top and support-mounted experiments. The low-friction discharge needle, which barely touches the spark-sensitive 1 cm tape, makes it ideal for air tracks and free-fall experiments. And for clarity of measurement the discharge needle (which is fully adjustable for greatest accuracy) leaves a double dot at each point. Includes a self-storing cord, bench clamp, and a free roll of spark tape. Operates on standard line voltage of 110 VAC, 60 Hz. P1-8000 $140 6 or more $132 each Spark-Sensitive Tape (1 cm x 40 m) P1-8000-01 Single Roll $9 P1-8000-02 Pack of 10 Rolls $75 To order visit arborsci.com 57