The chemist and druggist, 15. September 1859
29/106

THE PATENT PLUMBAGO CRUCIBLE COMPANY, Patentees of the Plumbago Melting Pots. Manufacturers and Importers of all desoriptions of Melting Pots, Crucibles, and other Fire-standing Goods, BATTERSEA WORKS, LONDON, S.W. CITY OFFICE -AJSTID SAMPLE E001VIS-2S, BOW E^ISTE, E.C. THE PATENT PLUMBAGO CRUCIBLES are now used in the English, Australian, American, Russian, Indian, and all the principal Mints of the World, from whom and Brass Founders, a few Testimonials are added :— FROM THE REFINERS TO THE BANK OF ENGLAND, LONDON. "Having adopted your Plumbago Melting Pots for the last few years, which we use to a considerable extent, we are so highly satisfied with their quality that we should on no account think of using any other, find- ing them more efficient, less liable to break, and a great saving in time. We have much pleasure in stating that they work to our entire satisfaction. 50,000 ozs. and upwards have been melted in one 1000 oz. Pot, and sometimes a larger quantity.—We are yours truly, "BROWN & WINGROVE." FROM THE MASTER OF THE MINT, PARIS. " These Crucibles, although dear in first cost, in consequence of being made entirely of pure Plumbago, possess qualities that have never been hitherto approached. I have now used them between two and three years, andmustadd that I cannot say too much in their praise. " Each Crucible runs from 40 to 60 pourings of pure metal, and can with safety be dipped in cold water when at a red heat, and used again immediately, as if it had not undergone any change of temperature. All the Crucibles that I have had last an entire week, and we never have an accident, they literally wear out, &c, &c. (Signed) "CHARLES DIERICKX." "Assay Offices, 78 & 79, Hatton Garden, London, E.C. October 14, 1858. " We have much pleasure in adding our testimony in favour of your Patent Plumbago Cf ucibles, which are superior to anything of the kind we have ever used.—We remain yours truly, " JOHNSON & MATTHEY." "58, Queen Street, Melbourne, Victoria. " In reply to your enquiry, we have much pleasure in informing you that we ore perfectly satisfied with your Patent Plumbago Crucibles, as they are far superior to any we have tried, and from their durability, hard- ness, and the very small quantity of metal that adheres to them, they are invaluable to all Melters. " We are your obedient Servants, u DANBURQHY & BAILLIE." " Shrewsbury Works, Sheffield, June 22,1858. ir Patent Plum ;hing of the ki mend them both for their safety and durability.—We are yours truly, " In reply to your letter we write to say that your Patent Plumbago Crucibles (which we have been using during the last three years) are much superior to anything of the kind we have ever met with, and can recom- " MARTIN, HALL, & CO." "Glass Works, near Birmingham, October 15, 1858. " We have great pleasure in testifying to the value of your Patent Plumbago Crucibles, which we have been using for nearly twelve months past. We have made on the average sibout thirty meltings in a Crucible, often exceeding that number, and occasionally reaching as high as sixt> m< Itings. The property they possess of bearing a sudden change of temperature without injury, renders them particularly valuable. We are, Gentlemen, your obedient Servants, tl CHANCE> BROTHERS, & CO." "Bishopsgate Foundry, Skinner Street, London, E.C , August 12, 1858. "I have great pleasure in adding my testimony to the excellence of the melting pots of your manufacture, from nearly a twelvemonth's experience of them, during which period they have conptantly been exposed to very severe and constant work. I can with perfect safety state they are the best description of Crucibles I have ever used, and I should unhesitatingly recommend them to every brass founder for their durability and economy. " Y°Ur °bedient S°rVant« "C. OSBORNE." The German Pots come from Rotterdam, therefore the following from the Director of the Fyenoord Works, the largest in that City, we conceive to be conclusive as to the superior economy of the Patent Pots in Germany itself: it follows their advantages must be still greater elsewhere : — "For three months we have continually used the Crucibles of the Patent Plumbngo Crucible Company, and we shall certainly never use any others, as they very far surpass all in their durability. "The superiority, in addition to the durability, consists in their never cracking in the furnace, which prevents the danger of losing the liquid metal, a circumstance that often happens wiih the ordinary Pots ; thus, for example, in a No. 35 we have melted 1239 Kilos (nearly 8000 lbs.; consisting of pieces of cannon and copper, whilst to melt the same quantity of metal would have required at least seven or eight German Pots. (Signed) "M. D. CRISTIE." Mons. Gllian, Engineer, Tirlemont, in Belgium, writes to Mons. Antoine, the Agent for the sale of these Crucibles in Brussels, that there is no kind of comparison to be made between them and the German, which are very uncertain, and only average 4 heats, whereas thefe melt generally about 48, also that they really hold the quuntity stated, or about one-third more than the »amc numbers in German.