The past is always with us, not only the physics history that we revere and try to put into our classroom presentations. Two hundred years of teaching natural philosophy (physics) have left us a significant amount of physics history in the form of early apparatus. In this article, I will tell stories about how I have become involved in the study of early physics apparatus. Because of my website on Historical Physics Teaching Apparatus, I have fielded a series of queries since the year 2000: I have inherited this apparatus, what is it and how much is it worth? My students turned up this interesting piece of apparatus and think that they might use it in an experiment—what is it and tell me how it can be put into the curriculum?

Topics
Microphones, Wave propagation, History of science, Optical imaging, Spectroscopy, Differential geometry, Educational aids, Teaching, Scholarly publishing, Journal
1.
Thomas B.
Greenslade
, Jr. , “
The acoustical apparatus of Rudolph Koenig
,”
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2.
Thomas B.
Greenslade
, Jr. , “
Apparatus for natural philosophy: Nineteenth century wave machines
,”
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Greenslade
, Jr. , “
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Thomas B.
Greenslade
, Jr. , “
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Greenslade
, Jr. , “
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6.
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, 5th ed., edited by
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, Jr. ,
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(
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,
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Avery
,
Elements of Natural Philosophy
(
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,
New York
,
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and
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Avery
,
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,
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13.
The Greenslade website can be
found at: <http://physics.kenyon.edu/EarlyApparatus/index.html>.
14.
Thomas B.
Greenslade
, Jr. and
Aaron J.
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, “
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15.
Thomas B.
Greenslade
, Jr. and
John
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, “
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,”
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16.
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Lagemann
,
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(
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,
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,
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Leland A.
Brown
,
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(
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,
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,
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18.
Thomas B.
Greenslade
, Jr. , “
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,”
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16
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19.
Thomas B.
Greenslade
, Jr. , “
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,”
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14
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20.
Thomas B.
Greenslade
, Jr. , “
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,”
Rittenhouse
13
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).
Google Scholar
 
21.
Thomas B.
Greenslade
, Jr. , “
Collection profile: Visits to apparatus collections V: The University of Mississippi
,”
Rittenhouse
19
,
16
–
26
(
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).
Google Scholar
 
22.
Thomas B.
Greenslade
, Jr. , “
Collection profile: Visits to apparatus collections III: Amherst College
,”
Rittenhouse
15
,
39
–
46
(
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).
Google Scholar
 
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