DOC.

18

DISCUSSION OF DOC.

17

449

Lecture held

in

Zurich, 16 January

1911.

Published

in

Naturforschende

Gesellschaft

in

Zürich.

Vierteljahrsschrift

56.

Part

2,

Sitzungsberichte

(1911):

II-IX.

[1]Alfred

Kleiner

(1849-1916),

Professor of

Experimental Physics

at

the

University

of

Zurich.

[2]See

Einstein

1907h

(Vol. 2,

Doc.

45),

§3,

for

an

earlier

comment

on

the

problem

of

a

rigid

body

in

the

theory

of

relativity,

including

a more

detailed

exposition

of the

reasoning

that

follows. Since

the

publication

of this

paper, a

vivid

debate

over

this

problem

was

developing,

reacting

in

particular

to

Born's

proposal

of

a

Lorentz-invariant definition of

a

rigid body

(Born

1909);

see

Pauli

1921, §45,

for

a

review

of later

developments.

For

a

discussion

of

the

historical

context

of

this debate,

see

Miller

1981, chap. 7,

and also the editorial

note,

"Einstein

on

Length

Contraction

in

the

Theory

of

Relativity," pp.

478-480.

[3]Fritz Müller

was a

law

student and member of

the

Naturforschende Gesellschaft Zürich.

[4]Franz Prasil

(1857-1929),

Professor of

Engineering

at

the ETH Zurich.

[5]Minkowski

1909.

[6]See

Lorentz

1892.

[7]Ernst

Meissner

(1883-1939),

Privatdozent for Pure and

Applied

Mathematics

at

the ETH

Zurich.

[8]See Minkowski

1908, Minkowski/Born

1910

for Minkowski's work

in

electrodynamics;

Cohn

1900,

1902,

1904a, 1904b,

for Cohn's

electrodynamics

of

moving

bodies;

and Lorentz

1909

for

a

comprehensive

review

of Lorentz's

theory.

[9]For

an

earlier

comment

on

the

relationship

between Lorentz's and Minkowski's

work,

see

Einstein

1909a

(Vol. 2,

Doc.

55),

pp.

887-888.

See

Miller

1981, chap.

1,

for

a

discussion of

Lorentz's

work;

Hirosige

1966

for

an analysis

of both Lorentz's and Cohn's

work;

and

Pyenson

1985, chap. 4,

and

Galison

1979,

for discussions of Minkowski's work.

[10]Einstein

discussed the

problem

of

superluminal velocities

extensively

in

correspondence

with Wilhelm Wien

in

July

and

August 1907;

see

Vol.

5,

the editorial

note,

"Einstein

on

Super-

luminal

Signal

Velocities."

[11]Rudolf

Lämmel

(1879-1972) graduated

from the

University

of Zurich

in 1904.

[12]See

Klein,

F. 1910.