Catalogue of the British Section.—Appendix.
9
PLATINUM AND PRECIOUS METALS
EXHIBITED BY
JOHNSON, MATTHE - ? & CO.,
HATTON GARDEN, LONDON,
Smelters and Refiners of Gold, Silver,
/latinum, Anlimony, Bümuth and Quicksilver,
and Manufadurers of Magnesium,
Potassium, Sodiurn, 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 Cheraically 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 autogenously
soldered (i.e. without Gold Solder), the
absolute peifection 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 tipon 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
boiter 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. —
YVeight, 4,728 grammes of very perfect form (only
one langer specimen is known to exist); also
Platinum Ore front 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 value 0/500,000frs.,
and were the only manufadurers 6f Platinum to vuhom the
highest awards were made in each of the three classes under
'which they exhibited.
Fondeurs et Affineurs d'Or, Argen/, Platine,
Antimoine, Bismuth, Argent-vif ei Fabricants
de Magnesium, Potassium, Sodium et
Produits Metallurgiques et Chimiques.
ALAMBIC de PLATINE, valeur 95,000 frs.,
pouvant concentrer 10,000 kilos. d’Acide Sulfurique
par jour. Cet Alambic est fait de Platine chimiquement
pur et combinant les plus nouveaux perfectionnemem
s. La tenacitfi et la force du metal sont du
plus haut degre quepuisseatteindreunemanipulation
habile. Les jointures sont soudees autog.nement,
c. ä. d., faites sans l’emploi de Tor. procSde dont la
perfection et la supSriorile ont 6tfi etablies par l’expfoience
de plasieurs annees; plus de quati e-vingts
chaudieres, faites d’apres le mente proeädg, et d’une
Contenance allant jusqu’ä 650 litres, ätant 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 ä tubes
etroits de 4,000 ä 5,000 millimetres. II est plus
commode et plus Sconomtque, occupe moins d’espace,
et refroidit l’acide ä un degre que ne peut
atteindre Tancien procedg. Plusieurs sont actuellement
employfis et partout avec le plus grand succes.
Une disposition specinle permet le Syphon de se
vider de lui-meme, quand, par accident ou manqtie
de soins, la chaudiere n’est pas suffisament approvisionnee
d’aeide. Ce perfectionnement previent
la cause la plus commune des accidents auxquels
ces precieux articles sont sujets.
APPAREILS en PLATINE, pour les essais
d’or, remplacemant les mattras avec plus de prficision,
de rapidite et d’economie.
Ces Appareils, dont 011 enverra, surdemande, des
descriptions detaillees, meritent Vattention de la
Monnaie et des Bureaux d’ Essais Etrangers.
INSTRUMENTS de PLATINE pour laboratoires,
creusets, capsules &c.
TRIDIO-PLATINE.—Lumt&res 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 connait qu'une
seule pepite plus grosse que celle ci); Minerals 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 T Exposition de Paris en 1867, JOHNSON, MATTHEY
8t Cie. exposerent des Appareils de Platine, des Metaux
rares et precieux et des Preparations Chimiques, d'une
valeur de 500,000 frs., et furent les seuls fabricants de
platine quiobtenirent les plus hautes recompcnses danschac*
une des trois classes de leurs produits.
b
