Abstract :
LAST year we devoted most of our pages to articles on technical writing and publishing. This year we will tip the balance toward audio and visual aspects of technical communication. In this issue, for example, we include some thoughts on lecturing. Though the four articles reprinted here range in time of origin from the first half of the 19th century to the second half of the 20th, they are remarkably consistent and provide some succinct guides toward the development of effective oral presentations.
