B chapter.indd - Charles Babbage Institute - University of Minnesota

230
Erwin Tomash Library
Bush, Vannevar Bush, Vannevar
Bush covers mechanical (including his own differential
analyzer), electrical and optical devices.
Illustrations available:
None
B 301
Bush, Vannevar E. (1890–1974)
Science. The endless frontier. A report to the President
Year: 1945
Place: Washington, D.C.
Publisher: USGPO
Edition: 1st
Language: English
Binding: original paper wrappers
Pagination: pp. x, 184
Size: 230x150 mm
This report was produced by Vannevar Bush, director of
the Office of Scientific Research and Development, at
the end of the war. World War II had stimulated a huge
leap forward in science and technology, and President
Roosevelt had asked Bush to prepare a report on how
best to release scientific information developed as part
of secret military programs. In addition, he was to
make recommendations about medical research, how to
further research in the private sector, and how to develop
a program to find and train the best scientific talent
among American youth. One of Bush’s most influential
recommendations was to establish a National Research
Foundation to fund research in American universities
and other institutions.
Illustrations available:
Title page
[Bush, Vannevar E.]
See Zernike, F.; De differentiaal-analysator als
vorbeeld van een continue machine, 1949.
B 302
Bush, Vannevar E. (1890–1974) and Harold Locke
Hazen (1901–1980)
Integraph solution of differential equations. In Journal
of the Franklin Institute, Vol. 204, No. 5, November
1927
Year: 1927
Place: Philadelphia
Publisher: Franklin Institute
Edition: 1st
Language: English
Binding: entire volume
Pagination: pp. 575–615
Size: 234x156 mm
The Bush integraph was the precursor to his much more
famous differential analyzer, announced in the pages
of this same journal in 1931 (see entry for Bush, The
differential analyzer, 1931). This integraph contained
two stages of integration, allowing the solution of
second-order differential equations: the first integrator
is a Thompson direct-current integrating watt-hour
meter; the second the more familiar Kelvin, wheel-disk,
mechanical integrating device. Having not yet developed
his torque amplifier (used in the Differential Analyzer),
Bush used servo-motors controlled by relays actuated
by contacts on the integrators to power the rest of the
system.
Illustrations available:
First page
General view of the integraph
Disk-Wheel integrator
B 301 Disk-wheel integrator, B 302