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In the museum wing of the Greenslade house is a clock with a two-second pendulum about one meter long (Fig. 1). This ticks once per second, and every time it passes through dead center it completes an electrical circuit. When I came to Kenyon in[...]Article
This article is about a famous physics course taken by thousands of students at Amherst College in the 1950s, designed and taught by its distinguished instructor, Arnold B. Arons. There are very few of us left who have taken the course. The youn[...]Article
Thomas B. Greenslade Jr., Auteur |In 1981 I published a note on “Balancers” as part of a series of illustrations drawn from 19th-century physics texts. Some months later a wonderful present arrived from a physics teacher in Japan, showing the range of our journal. This was the H[...]Article
The Leaning Tower is a long-time staple of the demonstration room. I can trace it as far back as apparatus catalogues from the 1850s. Some years ago, while teaching myself how to use a new wood lathe, I made a replica of the original design, sho[...]Article
The overhead projector is perhaps passing out of use, but it is still a useful device with which to do lecture demonstrations. In my early years at Kenyon I was teaching the pre-med course, and found that the overhead projector was an ideal plat[...]Article
In an earlier article I argued that much of what used to be called “modern physics” stems from the intersection of two earlier technologies: high vacuum and high voltage. In this article I will discuss the induction coil, invented in the 1830s, [...]Article
George M. Hopkins (1842-1902) wrote a series of articles on demonstrating physical phenomena in the Scientific American during the last years of the 19th century. These were collected in a book, Experimental Science, that was first published in [...]Article
About 30 years ago I taught a series of summer enrichment programs for high school physics teachers, using funding from the Howard Hughes Medical Institutes. I deliberately chose teachers from smaller cities and towns who were unlikely to have c[...]Article
Thomas B. Greenslade Jr., Auteur |The woodcut in Fig. 1 comes from a late 19th-century French book on the wonders of science. In it a girl is using the reflection from a transparent glass surface to copy a picture.
