DOC.

25 175

Doc. 25

Review

of

H.

BIRVEN,

Fundamentals

of

the Mechanical

Theory

of

Heat

(Grundzüge

der

mechanischen Wärmetheorie.

Stuttgart

and Berlin:

F.

Grub,

1905.

128

pp.

2.80

marks)

[Beiblätter

zu

den

Annalen

der

Physik

29

(1905):

950]

This

booklet

contains

a

concise,

elementary

exposition

of

the

thermo-

dynamics

of

gases

and

vapors

as

well

as

its

application in

the

theory

of the

steam engine

and

refrigerating

engines. Even

though

the booklet

displays

some

inaccuracy

with respect

to

the fundamental definitions

and expositions

(cf.,

e.g.,

the definition of

entropy,

p.

50),

it will

probably

stand in

good

stead [1]

to

many an

engineering

student

facing

his

exam

with

fragmentary

college

notebooks.

[2]

Doc. 26

Review

of

A. PONSOT,

"Heat

in the

Displacement

of the

Equilibrium of

a

Capillary

System"

("Chaleur dans

le

deplacement de

l'equilibre d'un

systeme

capillaire,"

Academie

des Sciences (Paris).

Comptes

rendus

140

(1905):

1176-1179)

[Beiblätter

zu

den

Annalen

der

Physik

29

(1905):

952]

The

author

examines

the foundations of

the

thermodynamic theory

of

capillarity

and

finds

in them

a

not

exactly

correct assumption; nothing

is

said about the order of

magnitude

of the

inaccuracies

that arise

from

this

[1]

assumption.