A mathematician, a physicist, and an engineer were traveling through Scotland when they saw a black sheep through the window of the train.

“Aha,” says the engineer. “I see that Scottish sheep are black.” “Hmm,” says the physicist. “You mean that some Scottish sheep are black.”

“No,” says the mathematician. “All we know is that there is at least one sheep in Scotland, and that at least one side of that one sheep is black!”

There are 10 kinds of people in this world: those who count in binary, and those who don’t.

Prefixes:

• 16.5 feet in the Twilight Zone = 1 Rod Serling
• 1000 pains = 1 Megahurtz
• Basic unit of laryngitis = 1 hoarsepower
• 1 million-million microphones = 1 megaphone

Our Spring 1985 issue of this newsletter offered tips on how to print graphs on “high resolution dot-matrix printers,” a new technology that was starting to appear in classrooms. We also announced that our Graphical Analysis program (for Apple II) had won the first of many awards from Classroom Computer Learning magazine.

Teachers often ask us how to get free or reduced price hand-me-down equipment. This may sound a little wacky, but a lot of people are selling older Vernier equipment on eBay! We often get calls from people who have found older probeware at bargain prices online. The list changes often, but we did a quick search of eBay recently and found a few photogates, one CBL, and some motion detectors! If you would like to trade (instead of sell) older equipment, there is a new thread on our discussion board where several people have offered to donate their ULIs to other schools. Go to www.vernier.com/discussion/

We recently redesigned our Motion Detector and made some enhancements that improve functionality, especially in physics applications (see page 1). In this process, we ended up with extras of the older model, and we are making them available at a great price. These are the models that we have been selling for many years. The only difference is that they do not come with a clamp, which is available separately. If you are looking for Motion Detectors at a great price, you might want to consider this option.

Motion Detector (for LabPro and CBL 2)	Order Code MDO-BTD	$45
Motion Detector (for ULI)	Order Code MDO-ULI	$46
Motion Detector Clamp	Order Code MD-CLAMP	$6

If you wish to order online, go to www.vernier.com/overstock