Catalogue of the British Section.—Appendix.
PLATINUM AND PRECIOUS METALS
EXHIBITED BY
JOHNSON, MATTHEY & CO.,
HATTON GARDEN , LONDON,
Smelters and Refiners of Gold, Silver, Platinum, Antimony, Bismuth and Quicksilver, and Manufacturers of Magnesium, Potassium, Sodium, and rare Metallurgical and Chemical Products .
PLATINUM STILL, value 95,000 frs., to concentrate 200 cwts. (10,000 kilos.) Sulphuric Acid per day. This Still is made of Chemically pure Platinum, and combines the most recent improvements in construction. The tenacity and strength of the metal are of the highest degree attainable by careful workmanship. The joints are auto- genously soldered (i.e. without Gold Solder), the absolute perfection and superiority of which process have been proved by the results of working, for many years, more than eighty concentrating boilers of capacities varying up to 650 litres, in use in most of the large and well-known manufactories throughout the world.
COIL SYPHON.—Length of Tube 10,000 millimetres, a great improvement upon the ordinary single or double Tube Syphons of 4,000 to 5,000 millimetres in length. It is more convenient and economical in working, requires less space, is less liable to injury, and cools the Acid to an extent quite unobtainable by the old method. A large number are in successful operation.
An arrangement is attached by which the Syphon empties itself if, by accident or carelessness, the boiler is not properly supplied with Acid, thus affording great protection against the most common cause of injury to these valuable articles . - PLATINUM ASSAY APPARATUS, by the use of which Gold Assays can be made with greatly increased accuracy, rapidity, and economy.
The especial attention of Mints and Foreign Assay Offices is called to this Apparatus, particulars of which will be forwarded on application . PLATINUM UTENSILS for Laboratory use.
Crucibles, Capsules, Dishes, etc., etc. IRIDIO-PLATINUM Gun Vents for heavy Ordnance, and Standard Weights and Measures, as decided upon by the Paris Commission for International use.
NUGGET OF PURE PLATINUM.— Weight, 4,728 grammes of very perfect form ( only one larger specimen is known to exist); also Platinum Ore from various localities. PALLADIUM.—Ingot of pure Palladium, value 48,000 frs., extracted from native Platinum and Gold of the value of 26,000,000 frs.
Precious and rare Metals; Chemical and Metallurgical Products.
In the Paris Exhibition , 1867, JOHNSON, MATTHEY & CO. exhibited Platinum Apparatus, Rare and Precious Metals , and Chemical Preparations of the 7m luc of 500, 000 frs ., and •were the only manuf acturers of Platinum to whom the highest awards were made in each of the three classes under \which they exhibited .
Fondcurs et Ajfimurs f Or, Argent, Platine, Antimoine, Bismuth, Argcnt-vif, el Fabri- cants de Magnesium, Potassium, Sodium et Produits Metallurgiqucs et Chimiques .
ALAMBIC de PLATINE, valeur 95,000 frs., pouvant concentrer 10,coo kilos, d’Acide Sulfurique par jour. Cet Alambic est fait de Platine chimique- ment pur et combinant les plus nouveaux perfec- tionnements. La tenacite et la force du metal sont du plus liaut degre quepuisseatteindreunemanipulation habile. Les jointures sont soudees autogenement, c. a. d., faites sans Femploi del’or, procede dont la perfection et la superiority ont ete etablies par l’ex- perience de plusieurs annees; plus de quatre-vingts chaudieres, faites d’apres le meme procede, et d’une contenance allant jusqu’a 650 litres, etant employees dans les plus grandes fabriques de tous pays. SYPHON SERPENTIN.—La Longueur du tube est de 10,000 millimetres, ce qui est beaucoup plus avantageux que les Syphons ordinaires a tubes etroits de 4,000 a 5,000 millimetres. II est plus commode ct plus economique, occupe moins d’es- pacc, et refroidit Tacide a un degre que ne peut atteindre l’ancien procede. Plusieurs sont actuelle- ment employes et partout avec le plus grand succes.
Une disposition speciile permet le Syphon de se vidcr de lui-meme, quand , par accidefit ou manque de soins, la chaudiere 71'est pas suffisament ap - provisionnee d'acide. Ce perfectionnement pre- vie 7 ii la cause la plus commune des accidents aux - quels ces precieux articles sont sujets. APPAREILS en PLATINE, pour les essais d’or, remplacemant les mattras avec plus de precision, de rapidite et d’economie.
Ces Appareils, dont o?i enverra, surdemande, des descriptions detaillees, meritent Vattention de la Monnaie et des Bureaux d'Essais Et rangers. INSTRUMENTS de PLATINE pour la- boratoires, creusets, capsules Sc c. IRIDIO-PLATINE.—Lumieres pour canons de gros calibre, etalons de poids et mesures, de la forme adoptee par la Commission de Paris pour usage international.
PEPITE de PLATINE PUR, pesant 4,728 grammes, de forme parfaite {on ne co?xnait qu'une settle pepite plus grosse que celle ci); Minerais de Platine de differentes localites.
PALLADIUM,—Lingot de Palladium pur (valeur 48,000 frs.), extrait de Platine et d’or natifs, de 26,000,000 frs. de valeur.
Metaux rares et precieux; Produits Chimiques et Metallurgiques.
A P Exposition de Paris en 18 67, JOHNSON, MATTHEY 8 c C ik. expose rent des Appnrei/s de Platine , des Metaux rares et precieux et des Preparations Chimiques, d'une vale in de 500.000 frs., et fureni les seuls fabricants de platine qui obtenirent les plus hautes recompenses danschac - une des trois classes de tears produits.