CHEMICAL NEWS

AND

JOURNAL OF PHYSICAL SCIENCE
wm Coted by 0s] (WITH WHICH IS INCORPORATED THE “CHEMICAL GAZETTE") [g, Established

7 Registered as [Price gd.
Vol. 44.—No. 1150.) 5 Friday, December g, 1881. Hains Es

. CONTENTS.
ARTICLES: — Page
On the Constancy of Thiosulphate Solutions, by Spencer Umfreville
 Pickering, B.A, OXONuiueeeencreresresrocnsaverossanisns 377
The Ele@&rolytic Determination of Copper, and the Formation
and Composition of so-called Allotropic Copper, by J. B.
Mackintosh, Hoboken, N.J. ...iveeiernervareanronsnesansesenes 279
CHEMICAL SoCIETY.~—~Laws of Substitution in the Naphthalea
Series—Benzyl-Phenol and its Derivatives—Aétion of Ethylic
Chioro-carbonate on Benzene in the Presence of Aluminic
Chloride—Peppermint Camphor (Menthol) and some of its
Derivatives—Production of Oxalic Acid from Paraffin Oil...... 284
NoTIcEs OF Books.—A Manual of Practical Assaying—First Re.
sults of Studies on the Formation of Colourinz-Matters by the
Eleé@ro-Chemical Way—Principles and Objeéts of the Chemistry
 Of Coalicusevocerseociressenseneserrosesrars--rorr-nenseee 284
CHEMICAL NOTICES FROM FOREIGN SOUR. - 286
MERTINGS "OR THR WRER 287

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A Chemist desires to become Assistant to an
Analyst. Has already been with a Public Analyst for three
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Has passed the examinations in Chemistry at the School of Mines
and the Practical Examination for the  Institute.”—Address, F.C.S.,
CueMmicar News Office, Boy Court, Ludeate Hill, London, KC,
A Gentleman (F.C.S.), aged 25, at present
Assistant in an Analyst's Laboratory, is desirous of obtaining
a Situation in London. Has a knowledge of foreign languages, and
can give good references. —Address, H., CHEMICAL NEWS Office. Boy
Court, Ludgate Hill, London, E.C. _
Ar Analytical Chemist, with an improving
pradtice, is prepared to arrange with an energetic and competent
 gentleman for a share in the same.—Address, Analyst, CHEMICAL
NEw s Office, Boy Court, Ludgate Hill, London, E.C.
A Young Gentleman, aged 23, wants a Situation
 in Chemical Works ; has been three years in Heidelberg
University under Prof. Bunsen. Good references.—A. B,, 4, Stranraer
Place, Maida Vale, London.
Traveller Wanted, who understands the Sale of
) Tar and Ammoniacal Produéts and general Drysalteries. Must
‘urnish references as to character and ability, and give security if
required. ‘To a competent, steady, persevering person liberal terms
will be given,—Address, by letter, A. B., CHEMICAL NEWS Office, Boy
Court. Ludgate Hill, London, E.C.

R DISTILLERS AND GAS COMPANIES,
The Advertiser is prepared to undertake to
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Head Foreman of Chemical Works seeks Re-4
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CHEMICAL NEws Office. Boy Court, Ludzate Hill, London, E.C.

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MANCHESTER MECHANICS INSTITUTION.

SCHOOL OF DYEING.—Under the direction
 of Mr. CHARLES O'NEILL, F.C.S,, F.I.C. Open to
Day and Evening Students. Prospectuses and all further information
may be had upon application or by post.
1. H. REYNOLDS, Secretary.
NOTICE.
I LEVINSTEIN & CO., of MANCHESTER,
* being informed that statements are circulated amongst their
sustomers to the effe@ that the sale and use of their dye
ROCCELLINE
constitutes an infringement of a patent of the BADISCHE ANILIN
AND SODA FABRIK, advertised by them, as numbered 786, and
lated 25th February, 1878, for a colour called FAST RED, instruct us
To give Notice
‘hat these statements are devoid of any foundation, and to state that
Messrs, I. LEVENSTEIN & CO, will guarantee any customer
ourchasing their
ROCCELLINE,
and effectually proteft them against any proceedings whatever ip
respect of the sale and use of such dye.
Dated the 2nd of December, 1881.
A. and G. W, FOX, Solicitors,
Princess Street, Manchester.

CENTRAL SCHOOL OF CHEMISTRY
AND PHARMACY.

V\/ anted, a Gentleman possessing a thorough
knowledge of Pharmaceutical Chemistry as Demonstrator in
the School. Salary f1oo.—Application, with full particulars, to be
sent to Messrs, Luff and Woodland, 173, Marylebone Road,
London, N.W. oo
{/\/ anted, an Assistant Chemist for a Manufattory
 near London. Salary £80, One acquainted with
ohotometric work and the testing of fats preferred—Apply, C.J,
CHEMICAL NEws Qffice, Boy Court, Ludgate Hill, Londen, E.C.