1376 THE COLLIERY GUARDIAN. June 27, 1913. CURTIS’S & HARVEYS PERMITTED t ^EXPLOSIVES which have successfully passed the latest Home Office test of being fired unstemmed into Coal Dust and Gas. SUPER-EXCELLITE. A Powerful Explosive, suitable for Ripping and Hard Coal. SDPER-KOLAX. For Coal Getting. Samples and full particulars— CURTIS’S and HARVEY LTD., Cannon Street House, London, E.C.,* or any of their Agencies. BRAKES AND CLUTCHES ARE BEST WHEN LINED WITH jHBEEBBI FRICTION SURFACE lAfflfll) creates sparks, smokes, burns, and is thus a constant danger for everybody. Wood wears quickly and you WUU1I cannot depend on its brake power, because oil, water, grease, or any other liquid affects its co-efficient of friction noticeably. In most cases you have to use reverse steam. UETAI creates sparks and gives a very spasmodic brake action. Spoils your brake path and gives an unreliable HI E> I AL brake-power. FERODO O fabric is absolutely spark-proof, it doubles your brake-power, no need to use 11 reverse steam. It lasts many times longer than wood or metal. Ferodo fabric 11 is cheaper in the end. Your men have confidence in your brake, wind faster ■■ and you get more coal every hour of the day. Ferodo fabrics engage sweetly, they save ropes and machinery. They give instant power and keep the drum path always smooth and unworn. WHICH IS BEST ? - We will gladly send samples. illustrated list and copies of testimonials to any inquirer. THE HERBERT FRODO CO. LTD POST BRAKE Sovereign Mills, Chapel-en-le-Frith. 39/41. UPPER RATHBONE PLACE, LONDON.