1052
PRUSSIA.
58 Hamann, A., Berlin —Inventor and Manufacturer.
A turning latlie of German material, exhibited on ac-count of its cheapness; the bed 4 feet long, 44- inchesbroad, and 4.% inches high, with head-stocks 6 inches high,to the centre; 12 screw patterns and chisels; a platewith 8 divided rings and index; iron fly-wheel, to beturned by the foot; sliding and common rest; and otherrest for supporting in case of boring with a drill, to borechucks. A small rest with round pivot, attached toa sliding bed with holders for chisels and drills. Adrillmg-frame for ornaments. Upon the spindle arefixed, a universal chuck of 11 inches, with 4 stoppers; asmaller one of 8 inches, with holders moved by screws;an oval chuck; an eccentric chuck; a wire chuck with 3holders, for wire of l-3rd inch diameter. Chucks ofwrought iron with 8 screws, 2 hollow chucks, chuck inthe form of a drill, and chuck with a wood screw, 1 drill,1 centre chuck, and 1 key.
59 Renner, S. B., jun., Breslau —Manufacturer.
Specimens of a zinc roof after the construction of theexhibitor, which requires only a very small inclination,and by which the zinc can expand and contract accordingto the temperature. The fastenings of the plates with-stand the most violent storms.
Models of the same on a similar scale.
CO Gehrmann, T., Berlin —Manufacturer.
Priming-pin rifle-gun, inlaid with silver, half stock andhah’ trigger. Rifle, with full stock and hair trigger,arranged to receive a hunting-knife. Double-barrelledgun, with grooved barrels inlaid with gold and silver.Shooting implements.
01 Lueddich, Wiuielm, Bosen —Manufacturer.
Rifle, with screw-driver, powder measure, and bulletmould.
02 Oiile, Ernst Frederic, Heirs of, Breslau —Manufacturer.
Samples of shot-tubes made by the hydraulic press,tinned inside and outside, and of ten different calibres.Pressed wire of different diameters. Red lead and lithargecarefully prepared. String of bullets. Sheet lead tinnedbj' an improved method:—all of Silesian lead.
63 G-rzybowski, H., Potsdam— Manufacturer.
A gun of fine workmanship, in a case of rosewood,mounted in German silver.
64 Keiid, John Conr., Berlin —Manufacturer.
A pair of pistols, highly finished, with implements forcleaning, casting balls, &c. Gun-barrels finished by theexhibitor.
65 Stoble, Dr. Edward, Berlin —Inventor and
Patentee.
Patent chaff-cutting machine for straw and other vege-table substances, containing a new application of vulcan-ized India-rubber. Manufactured by F. Thiele, Berlin .
66 Bruckisch, Wilhelm, Koppitz , near Groikau —Proprietor.
Beeliives on tbeDzieron system, out of which the wax,honey, bees, &e., are easily taken. Erect double beehive 5long low beehive; queen bee’s basket; straw hive, entire,and divisible into parts; models of the same.
67 Strengel & Hartmann, Begemvalde , Pomerania—Manufacturers.
Sowing-machine; drill-machine; Indian com thrashing-machine; Flanders plough, altered by Schwarz; Pome-ranian vibrating plough ; Mccklenbourg hoe, with yoke;East Prussian scarifier, with yoke; 16-share crooker;underground plough; water-furrow plough.
68 Gtterun, Pierre, Berlin —Manufacturer.
Night-clocks; cartel bronze clocks. Sundry clock-works. Regulator-works.
69 Krueger, Augustus, Bromberg —Inventor.
Electro-magnetic self-registering anemometer, A sys-tem of four electro-magnets, each encircled with 50 feet ofcopper wire. The galvanic circuit is completed by quick-silver every hour by means of clockwork.
By means of this instrument the eight different pointsof the wind may be discovered at any time and at anydistance; at the same time, the direction of the wind canbe hourly written down by means of the clock.
[Hydro-electricity, winch is the grand agent in opera-tions of this kind, is different in the phenomena it exhibitsfrom that of dry electricity, or that shown by an electricalmachine. For whilst the latter exliibits its most remarkableproperties, by accumulation, even at rest, as in the chargedjar, the electricity of the galvanic battery is scarcely percep-tible, unless that which is called the circuit be complete;which is the case when the poles of the galvanic battery areconnected by a continuous piece of metal, as a wire, orother conducting substance, as water, then considering thebattery as a conductor, and hence the circuit is com-pleted. The electricity, during the time the battery is inaction, moves through the circuit. This conducting circuitmay be of any form.—J. G.]
70 Kunst, Johann A., Berlin —Manufacturer,
Sets and half-sets of artificial teeth. Samples of enamelinvented by the exhibitor for the manufacture of a singletooth or set of teeth.
71 Bessalie, II. P., Breslau —Manufacturer.
Patent rosewood grand piano, with English mechanismand arrangement, for easier tuning and tightening thewires.
72 Tiiiemke, A. F., Berlin —Manufacturer.
Brass travelling clock, in leather case, with stop andcompensator to go eight days, strikes the quarters andhours, and repeats at every quarter the last hour.
73 Guricke, B., Zossen , near Berlin —Inventorand Manufacturer.
Grand piano in rosewood, with powerful repeatingmechanism. The mechanism patented in 1849.
The piano was wholly constructed by the exhibitorliimself.
74 Siegert, C., Stettin —Manufacturer.
Complete vacuum-apparatus on a wooden stand ; double
working air-pump, with a wooden stand, belonging to theabove.
75 Seemann, Gustav, Warmbrunn —Manufacturer.Small house-clocks, exhibited for beauty and execution.
76 Baumann, Theodor, Berlin —Inventor.
An instrument for ascertaining the length of measures,after Bessel’s mode. The micrometers are placed on astrong mahogany beam, and the slide, which carries thetwo measures to be compared, is so arranged that it movesthem exactly behind one another in the micrometer line,and there retains them. One perfect comparison (whichconsists of eight measurements, to be executed 4 times in24 hours) suffices to ascertain, the length of 3 feet (1 yard)to within O. 0002 lines ; this requires only half an hour.
Two-yard measures, one of which represents the lawfuland accepted measure ; the other a copy, to he comparedwith the former.