INCLUDIXG THE PROCEEDINGS OFTHE “SOCIETY OF PUBLIC ANALYSTS.”A Monthly Journal for the information of those interested in the purity of Foodand Drugs, and in general Analytical and Microscopical Research.CONIIEETING OF SOCIETY OF PUELIC AIK~LYSTS ........ 121ON THE EXAMINATION OF SPIKITCS 1E:nmnI s Nr,~cosr.By Dr. Duprc .................................. 121OX ESTIMATION OF ETIIYr, ~IT1:ITE I N SPII~ITL%ETHERIS NITROSI. Cy Dr. nlnter. .............. 1%ANALPSLS OF FLOURS AND BREADS. By J. Cartrr Dell 1%EXANINATION. By G. W. Wgner ................ 133ON DR. XOETTSTORFER’S ?TII?TIIOD FOR BUT TI,:^.TENTS.SALE OF FOOD ASD nRCGS ACTI ~ l ~ V I ~ ~ Y S .....................COIUIESPOXDENCE .............AXALTSTS’ REPORTS ...........LAW EEPORT~ .................NOTES OF TIIF.MONTI~ ........Goorrs HECEIVED .............CHEMICAL PATENTS ...........AMIESDJIENT BILL . . 133 ..................... 134 ....... .: ............ 1:2j .................... l?G ..................... 137 ..................... 133 ..................... 139 ..................... 140COMMITTEE O F PUBLICATION OF THE SOCIETY’S PIiOCEEDINGS.J. MUTER, PILD., M.A., F.C.S.G. W. WIGNER, F.C.S.A. H. ALLEN, F.C.S.A. DUPRO, PH.D., F.B.S., F.C.S.C. HEISCH, F.C.S.AGSTTcACTORS.E. W. T. JONES, F.C.S.J. FALCONER KING, F.C.S.C. H. PIEGSE, F.C.S.A. WYNTER BLYTH, M.R.C.S.C. A. CAMERON, M.D.OTTO HEHNER, F.C.S.IMK. ;TA.CEKSON d& C0.965, BARBICAN, LONDON, E.C. (nearly opposite the Aldersgate Street Station o f the Metropolitan Railway),(J.ORME AND H. M. CAPNEB,)FINEST BERLINPORCELAIN.ScientificApparat n s,BOHEMIANGLASS.GRADUATEDI N STRU M E N TS.-HOFMA NN’SA PPA RA TUS.-ALSOELECTRICAL,G A L VA N IC,PNEUMA TICA P P A R A TUS,&c., dic. WEOLESALE AND EXPORT. rlPureChemicals.COMPLETESETS OFQUA L l TA TIVE,QUA N T l T A TIVE,VOLUMETRIC,AND ASSAYA PPA RA TUS.-PLA TTN E R’SBLOWPIPE.-EGGERTZCARBON. -A N DTHOMPSON’SFUEL TESTAPPARATUS.Makers of Apparatus to the Laboratories of the Inland Revenue, Royal Arsenal, Royal MilitaryAcademy, Science Schools, India Office, South Kensington, &c.Catalogues and Estimates sent on npplicntion, enclosing Business Card f o r Terms, &THE ANALYST.WORKS BY DRm MUTER, RI.A., F.C.S.,President of the Society o f Public Analysts ; Public Analyst for Lambeth, Southwark,Bermondsey, - Rotherhithe, Newington, and Wandsworth,Now rcacy, demy Svo, with copious Tables, price 7s.6cl.A N INTRODUCTION TO ANALYTICAL CHEMISTRY. or Medicaland Pharmaceutical Students.Now ready, royd 8v0, Second Edition, cloth, with Analytical Tables and copious Index, price 10s. 6d.A N INTRODUCTION TO PHARMACEUTICAL AND MEDICALCHEMISTY, Theoretical and Practical.6 ‘ The book is one of a very useful and original kind, and is brought up to the latest date, tests and‘‘ Amongst thc best chemical treatiscs of the day, and in many respects superior to m y that have yetprocesses published only a few months since being described in thcir proper places.”-CChemict!l News.been published.”-Pziblic Health.Third Edition, 600 pp., 8vo. Price 12s. 6d. A KEY TO ORGANIC MATERIA MEDICA.active principles of drugs.drugs.Analytical Chemists millfind this a concise and yet complete book of reference for the isolation and examination of tlieSpecial sppenclix on the microscopic characters of the starches in food a i dCopious index and qualitative courses or resins, &c.LONDON : BAILLI~RE, TINDALL RS Cox, 20, King William Street, Strand, and all Booksellers.By A, WYNTER BLYTH, M.R.C.S., F.C.S,, Public Analyst fop the County of Devon,NOW READY, crovn Svo, cloth, 12s. Gd.PRACTICAL CHEMISTRY (A Maiiual of).DETECTION OF Porsor\.s-Organic or Inorganic. With Tables and Diagrams.Analyst.”--Lancet.PART I: ANALYSIS OF FOODS-Flour, Bread, Milk, Butter, Cheese ; Tea, Coffee, Cocoa ; Alcoholic Liquids ; Condiments.PART I1 :“ ’ilrill be used by every‘‘ Stands unrivalled for completeness of information.”-Sa?aita~y Record.LONDON : UHABLES GRIFFIX 6t. Co., Stationers’ Hall Conrt.By G;. W. WIGNER, €,C.S., one of the Honorary Secretaries of the Society of Public Analysts;Public Analyst for Greenwich, Plumstend, and Woolwich Districts.Price, ONE SHILLING.SEASIDE WATER. An Examiiiation into the character of the Water Supply atthe Watering Places of England and Wales, being an abstract of a Series of Reports prepared fornnd published in the Sanitary Record during 1877-78, with Three Comprehensive Tables, giving Analysesof the Drinking Water at all the Sea-Coast Towns.KENT & Co., Pateriioster Row, London ; and at all Railway Bookstalls.E. C E T T Z & GO.,MANUFACTURERS OF BAROMETERS, THERMOMETERS, CHEMICAL ANDPHILOSOPHICAL APPARATUS O F EVERY DESCRIPTION.Dr.Franklin’s Apparatus for Analysis of Water. Dr. McLeocl’s Modification for Water and Gas.Professor Bischof’s Apparatus for Evaporation of Water. Dr. Sprengel’s i\’Iercurial Air Pumps of everyform. Water P ~ m p s for quick filtration. Dr. Mill’s Colorimeter.Drs. Russell and West’s Apparatus for Estimating Urea in Urine. Dr. Blackley’s Apparatus for Ditto.REGISTERED 321u’AMEL BACK URINE SEDIMXNT TEST TUBES.11 and 31, Brooke Street, Holboni, London, Wholesale and for Exportation, and Rose CottageGlass Wo~ks, Pratt Street, Lambeth.HARD OR SOFT WATER ?-THE PORTER-CLARK PROCESSFor the Softening and Filtration of Water in large quantities, within sinall space, at small cost.The rcmowl of the carbonates of lime axid mngnesia and iron frcm hard waters is the removal of(a) The cause of enormous waste of fuel occasiond by incrustation of steam boilers and pipes ;(a) The cause of imperfect cleansing 2nd puriEca:ion of and injury to 1ine:i and woollens iu laundries;( c ) The cauw of the frightful waste of soap, soda, and other alkalies by which those injnries are imparted and theimpurities retained.In County Asylums, Steam Laundries, and Manufactories * and for the TGWI Supply of Old and New Swindon and the Rsiln-nyWorks, the Porter-Clark Process is triating hundreds of thousands of gallons per day.The filtration is exquisite, a d cverytking arrested is removed daily.Patented by JOHN HENDERSON PORTER, C,E,, 1 & 2, Tudor St,, Blackfriars, London, E,C