April 20, 1917. THE COLLIERY GUARDIAN. 759 IIIIIHIAII IBBBBBBV ibbbbbwj !■■■■■■■! IBBBBBBBI IBBBBBBBI ■■■■■■■■■ !■■■■■■■■■! ■ ■■■■■■■■I IBBBBBBBBBI ---------|BI IBBBBBBBBBBBI (■■■■■■■■■■■I IBBBBBBBBBBBI__ IBBBBBB ■rnnmniiiiMiiiiimiiimmiimiiiiiaai -------------------:bxbf MBBBBBnBHBBBBflBBBBBBI________________________ IBBBBaVBHBBBBRaBBBBBBBBai IBBBBBBMBBBBBBBBBBBBBBBI IBBBBBBBBBBBBBBiBiBBBBBBBBI nBBBMBBBBBBBBBBBBMBBBBI IBBBBBBBBBBBBBBBBBBBBBBBI BBBBBBBBBBBBflBBBBBBRBBI IBBBBBBBBBBI BBSBBSBBBBB HI IBBBBBBBBBBBBBBBBBBBBBBI “Z““ZZZJB II IHBBBBBBB’WBBBI SSHHHNHi^SHSSSF........... IBBBBBBBBH IF'------ __IBBI ________________IBBBBBI IBBBBBBBBBBBX=====T—T=aBBBI BBBBBBBBBB' IBiriBBF 4rBBB ------ibbbbb IBBBBBBK7 z/.F M JF4F Jr _JBBBBF .JSLSrJT '55 IBBBBBBBBBL._^BBBBBBBBBBBBBBF^BBBI -frwwMxaBBaBBBBBBBFX^VBBBBBBBBBBBB Aibbbbbbbbbbbbbb^'I' v 5f»-tFrrir:TWBB *»'BBBBBBBBBBBBBB .->51WII L"5 L -J ikk”>BB aaBBBBBBBBBBBBBBBBBBBBaBBBBBBBBFBI IBaBBIBBBBaBBBBBBBIBBMBIBBB»IIBB» ----------IBBKIBBBBBBBBrBBBBBBBBnafll ----------MBB IBZTTTrrrS 3BBCTSY3: » BHBBBBBBBBBBP NBB I SB IBBBBBBBBBBBBBBBBBBBBBBBI BBBBBBBBBBB -----------IFBBBBBBBBBBBBBBBBBBBBBB IBBBBBBBBai___________________________________________ ■BBBF4BBBIJBBBBB*" «r-BF^BZBBBBBBBBBBBBBBBI IBBBBBBBF>^.r.B’7.TFirTF-’7BFJFB7JF2B';jBBBBBBBBBBBl --------ibp .A- <■: »-aaaaBBaBaai IBB^^^Bh.ahaMflPBMBMflarjflBRflBBBBBI ----------------------------BBF^BBBIBF BBBBBBBBBBBI --------IBrjPBP^BF/JBBBr.BBBBBBBBI IBBUBI IBBBBB'jBBBBBBFPXBBBBaF’JBl WZXBBBF/JBF'-MBB BI «1^BBBBB’’.BBBBBB> XBBbBBBF/jflBBv^PMBBFJBr ICBBBBBBI j, tiTrATi’ilTi'immTA'a S JFI^Pr? J^BI ----------- ------ --------------- '-A'Al n -'4BI --------------------------------------------------- IF „aBBI PLOWRIGHT BROS. LTD., Brampton Iron Works, Chesterfield. Speciality— COAL SCREENING«CONVEYING SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER. Simplex Conduits, Limited, GARRISON LANE, BIRMINGHAM. 113-117, Charing Cross Road, London, W.C. 2. 6, White Horse Street, Leeds 16, Corporation Street, Manchester. 96, Whitechapel, Liverpool. 72a, Waterloo Street, Glasgow. 14, Heathfield Street, Swansea. 61-65, High Bridge, Newcastle. 4, Westgate Street, Cardiff. 10 & 11, Denmark Street, Bristol. 1, Crimon Place, Aberdeen. .CONSIDERABLY OVER 100 PLANTS NOW AT WORK IN CREAT BRITAIN AND THE COLONIES. Estimates and Designs on application Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon. 6/ TO 8 ; SAVING IN FUEL, or 1 2^ TO 1 5% MORE STEAM SINGLE HOOD Circulator 39,Victoria Street, London, S.W. 1 / CHECKS and ‘.^KtriO u O^.c \ BRASS / PROTAN For BOILERS. 55 ........................ A Commercial form of TANNIC ACID (Containing 48—50 °/o TANNIN). BRITISH MANUFACTURE. In conjunction with Soda Ash Enables the Boiler User to compound the most efficient ------ SCALE REMOVER -------------- at only a fraction of the cost of Proprietary Compositions. Co >">> posi t ion can I> e based on analysis of water. Samples and further particulars from CLEMONS, MARSHALL & CARBERT, Branch of The Yorkshire Dyeware and Chemical Co. Ltd., Leeds. PATENT “MAC” NT VALVE. Suitable for the Screw Figure 8200—Inside Figure 8205—Outside Scx«ew kll?'___ Suitable for the Highest Steam Pressures. Fitted with flopkinson’s>( Platnam ’’ Metal Renewable Valve and Seat. All parts interchangeable. All joints made by metallic contact, thereby obviating the necessity of using jointing material. By removing the cover the seat and valve are withdrawn, enabling new parts to be in- serted in about a minute’s time, and without the neces- sity—as with ordinary valves —of removing the valve body from its fixed position. The Renewable Valve and Seat is made of Hopkinson’s “Platnam” Metal which is suitable for superheated steam and bad waters. There are many valves with renewable valve and seat upon the market, but under modern conditions and high pressures do not last any length of time owing to the deterioration which takes place on the valve and seat, and consequently the renewing of the parts is a frequent occurrence. We have tried our “Platnam” Metal under severe conditions, and have every confidence in recommending it to work under high temperatures. The “ MAC ” valve has been designed to adopt this metal for the renewable valve and seat. Upwards of 500 tons of Standard Steel Castings kept in stock. We can give immediate delivery of iron and steel Valves. Illustrated Catalogue Post Free on Application. J. HOPKINSON & C° LR Huddersfield, Makers of Patent Safety Boiler Mountings and Valves For High Pressure Superheated Steam, High-class Exhaust and Water Sluice Valves for Condensing Plants, &c., Automatic Exhaust Valves, Reducing Valves, Steam Traps, &c., &c. Depots & Showrooms—London, Glasgow, Edinburgh, Cardiff, Oldham, Blackpool, Paris & Petrograd. No. 374.