Contents of the March/April 1999 issue of Quantum 

Feature articles

Core dynamics by A. Dozorov Why does a transformer need a core?
	Art by Pavel Chernusky

Convection and displacement currents

by V. Dukov

Painting the digital world

by Michael H. Brill

Divide and conquer!

by Ruma Falk and Eyal Oshry

Departments

Physics Contest: Elevator physics

by Larry D. Kirkpatrick and Arthur Eisenkraft

In the Lab: Diffraction in laser light

by D. Panenko

At the Blackboard I: Gliding home

by A. Stasenko

At the Blackboard II: One's best approach

by O. T. Izhboldin and L. D. Kurlyandchik

Looking Back: The century of the cycloid

by S. G. Gindikin

Musings: Sky

by David Arns

Cowculations: Dutch treat

by Dr. Mu

How Do You Figure?: Challenges in Physics and Math

Brainteasers: Just for the Fun of It!

Crisscross Science

Happenings

Answers, Hints & Solutions