The chemical analysis of foods

366

BOOK

REVIEWS.

[J. F. I.

BRAGG,SIR W. H. and W. L.--X-rays and Crystal Structure. Fifth edition. 192.5. Brassey’s Naval and Shipping Annual. 1926. BROCLIE,MAURICE nE.-X-rays. Translated by J. R. Clarke. No date. Bulletin Year Book and Almanac, 1926. CLAYDEK,ARTHUR W.-Cloud Studies. Second edition. 1925. Cox, HENRY EnwARn.--The Chemical Analysis of Foods. 1926. ELSKER, Farrz.-Die Praxis des Chemikers. Ninth edition revised by W. Plucker. Igq. FALOON, DALTON B.-Zinc Oxide: History, Manufacture and Properties as a Pigment. 1925. FORD, LOUIS R.-Practical Marine Diesel Engineering. 1925. GUNTHER, R. T.-Historic Instruments for the Advancement of Science. 1925. HART, MORRISD., and SMITH, W. WHAmt.v.--The Principles of Sound Signalling. 1925. HOLMYARD,E. J.-Chemistry to the Time of Dalton. Igzg. LILLEY, ERNEST RAYMOND.-The Oil Industry. 1925. MACARDL~, DONALDW.-The Use of Solvents in Synthetic Organic Chemistry. 1925. MELLOR, J. W.--A Comprehensive Treatise on Inorganic and Theoretical Chemistry. Vol. vi. 1925. MUENSTER,C., and RADESTOCK,W., editors.-Zuckersteuergesetz, Siissstoffgesetz, Kakaozollvergiitung. 1925. MURRAY, W. S.-Superpower. 1925. PARTINGTON,J. R.-The Alkali Industry. Second edition. 1925. Photograms of the Year 1925. SIEGBAHN, MANNE.--Spektroskopie der Rontgenstrahlen. 1924. TRUMPER, MAX.-Memoranda of Toxicology. With Introduction and Addenda by Henry Leffmann. 1925. Commerce Year Book for 1922, 1923 and U. S. Department of Commerce. 1924. Three volumes. rg23-1925. WARNES, ARTHUR R.-Coal Tar Distillation and Working Up of Tar Products. Third edition. 1924. Wasserkraft Jahrbuch 1924. WEBER, GUSTAVUS A.-The Bureau of Standards: Its History, Activities and Organization. 1925. WILSON, SAMUEL P.-Pyroxylin Enamels and Lacquers. 192.5. World Almanac and Book of Pacts for 1926.

BOOK

REVIEWS.

THE CHEMICAL ANALYSIS OF FEUDS. By Henry F.I.C. vii-323 pages, illustrated, small 8~0. Son and Company, 1926. Price, $5.

Edward Cox, M.Sc., Ph.D., Philadelphia, P. Blakiston’s

The subject of food analysis has become so extensive of late years that a large volume is required to cover the general and special procedures. The author of this book has succeeded in comprising a large amount of information and expressing it in clear form, but being fully conscious of the limitations

of

the

volume,

manner

suitable

Only

the

methods

as a rule, lvholly

elements

only

to chemists which

but

have

in some

satisfactory

have

been

cases

ones

well

of general

ments

analytical

developed.

The

author

The

and

assumed.

feels

that

such

drawings

of microscopic

even

when

most

carefully

clone, are but

The

study

of the microscopy work

of food

be with from

contact

in food

the

many

points

nation

has

its

specific

problems.

indeed

in some

respects

it seems

the

substitutes

for

as with

all other

fields

British

analysis

specimens

American to be definitely

oi the

works.

of fact,

actual

such,

experience.

of application

of

illustrative.

are,

of

countries,

is not

instru-

to special

There

different

work

that

properly

standpoint. in the

given as no

not been much

as a matter

poor

and

are

standard

has

be left

but,

a

field.

described

is rather

with

should

:n

in the

and Drugs Acts, than A competent knnwl-

of foods

fields,

instruments

is notably of

been

of view

familiarity

presented

trustworthy

have

point

phases

a few

The

been cxperiencc

found

Microscopy

are

should

and

have

processes

There

the microscope

no special

(British) Sale of Food branch of food industry.

chemistry are

subject

had tested

are available.

of the laboratory

the

provisional

public health official and of the of the n-orkers in any particular cdgc

of

who

conrse,

but

strongly

each

featured,

ignored. HEXI
THE

ESE OF

SOLVEKTS

MacArdle, D. Van This

Nostrand

is a very

been very

organic

of

chemistry

It appears

that

University.

vii-2x7

1925. Price,

Company,

and valuable

discussed

features

initiative

SYXTHETIC ORCAKIC CHEMISTRY.

II-G

Boston

interesting

extensively

the practical the

B.S.,

in physical

of

essays

similar

to

the

it was

first

intended

on

German

The

chemistry, the

the less welcome back

very

of the book,

considerable volume or other distinct

when

its production is covered

each

reference

advantage.

The

available

abstract references

of compilation. The data

and

extensive,

of solvents.

operative of

The

being

by a serial are given

with

books,

and

\V:yl.

but

it was

it was

decided

but it is none

bibliography,

which

of the references number.

very

as

synthetic

is

in the

This

method

has

satisfactorily,

year

and

being

journal are

include

commendable.

of

Lassar-Cohn these

has

deals

It is planned

technique

translate

by a concentration

references

W. York,

of solution work

found that an immense amount of revision was needed and to build up from the base. Necessarily the book is a compilation, naturally

Donald New

nature

but this

works

to simply

By

So.

$g.jO.

work.

of the use and applications

a series

pages,

included. In many cases the abstract in C. A. The fact that slightly over nine hundred is given. given shows how searching has been the work

methods

for the preparation of solvents in pure form, is given to the preparation of absolute alcohol. ln many interesting and useful the chapter on the promotion of crystallization facts are set forth. The purpose of the chapter is to furnish information as to how crystals may be secured and not produce specially fine or typical forms. Another phaseof the subject which has no direct concern with the scope of this book is the obtaining of large perfect crystals, such as were desired during the vqar for application in piezo-electrical tests. Very ingenious and useful

among which much attention