404
[Unite 1 ’
measured. It is painted so as to combine both geographyand geology, the phenomena being carefully delineated.
A blowpipe giving an uninterrupted and regular flame,for chemical analysis and other purposes.
An oxyhydrogen microscope, with new safety tubes andan adaptation of the blowpipe for chemical and otherpurposes, also an arrangement for collecting the gasesseparately.
Manufactured by C. W. Collins, Royal Polytechnic In-stitution, Regent Street.
460 Newberry, F., Stoke Newington Green —Producer.Electrotypes.
repeat tongue check action. Ivory is r-eplaced by anewly-invented material for the keys.
469 Southall, William, 16 Baker Street,Portman Square —Manufacturer.Grand pianoforte.
470 Stodart, William, & Son, 1 Golden Square-'Manufacturers.
Patent rosewood horizontal grand pianoforte.Compact rosewood square pianoforte.
464 Harrison, John, 2 Chorlton Terrace, Upper BrookSt., Manchester—Inventor and Manufacturer.
Electrical battery, intended as a substitute for theLeyden jar.
Galvanic battery, combining the inventions of Profes-sors Smee and Faraday, with a new mode of connexionfor producing either quantity or intensity of the electriccurrent.
464a Harrison, J., 45 Upper John Street, Fitzroy Square—Manufacturer and Inventor.
Model of action generally used by pianoforte manufac-turers.
Model of registered boudoir pianoforte; action to showin what the improvement consists.
Pianoforte with the registered action.
465 Wellwav, John Sweet, 7 Denmark Street, Bristol—Inventor and Manufacturer.
Siphon trough, for galvanic battery, made of guttapercha and vulcanized India-rubber; tubes passing fromthe bottom of each cell to a main tube, form a siphon, bywhich the trough may be emptied when out of use; agutta percha valve, of new construction, closes the maintube when the battery is in use.
Registered gas-carrier’s apparatus, rendering gas port-able. A drum revolving horizontally, by means of aspring between the ceiling and floor of the room above,round which several feet of glazed vulcanized India-rubber tubing are coiled, which communicate with themain gas-pipe of the house. When in use, one end ofthe flexible tube is attached to a portable lamp-stand,which, when carried to a distant part of the room, isallowed to recede by the unwinding of the flexible tube;when the light is brought back, the revolving drum windsup the tubing. When out of use, the tubing is detachedfrom the lamp-stand ; it is then immediately coiled up bythe drum.
406 Taylor, Thomas, 17 Fleet Street, Dublin • —Inventor.
Pneumatic battery, for igniting gunpowder in the blast-ing used in mining operations. Each cell is filled withsulphuric acid. The operator, blowing through the gutta-percha tube, forces the sulphuric acid out of each cellthrough the short siphon tubes ; it then comes in contactwith a compound of the chlorate of potass, loaf sugar,and gunpowder, when an explosion takes place. Thegutta-percha tube may be of any length, thus placing theoperator in perfect safety.
467 Kirkman, Joseph, & Son, 3 Soho Square, and
9 Dean Street —Manufacturers.
Miniature model of a grand pianoforte, six and three-quarter octaves, metal braces, and drilled bridges.
Seven-octave, full grand pianoforte, with repetitionaction, in rosewood case.
The fonda semi-grand pianoforte, in walnut case.
Oblique piccolo pianoforte
468 Greiner, Geo. Frederick, 51 Upper MarylcboneStreet, Portland Place —Inventor and Maker.
Semi-grand pianoforte, constructed on the principleof the speaking trumpet, with unison tuning-screws, and
471 Cadby, C., Gray’s Inn Pianoforte ManufactoryManufacturer.
Grand pianoforte, in rosewood, on the exhibitor’spatent suspension principle. The sounding-board, i nSt ^‘ enof being glued or permanently attached to the wooframing, is suspended from it by metallic attachmen ’which, being adjustible, admit of its being US* 1strained, to increase the tone. The letters A, B, C )n k.annexed cut represents the adjustable metallic att aments.
Cadby’s Grand Pianoforte.
Grand pianoforte, in zebra ■wood, on the same principmodified. . . n 0 f
Upright cottage pianoforte, showing the appl ica °the same principle to the cheaper kind of pianofort 6
472 Rolfe, William, & Sons, 61 Chcapside — 1Manufacturers.
Specimen of a two-unison common cottage pia* 10 Jlt lcombining the advantages of the ordinary repetition,check or double actions. Uen ce
Pianoforte, in which stability, economy, and exceare the objects aimed at.
473
Deacock, T.—Manufacturer.
A pianoforte.
474 Brinsmead, John, 15 Charlotte Street, Fitz r0, J
Square —Manufacturer. a jjy
Registered pianoforte—the long brass joint g e jpgseen upon the fall of pianofortes, obviated when f nS trii'by a simple contrivance. The case permitsment to be placed in any part of a room. Hm i ; nS tr a 'device in the central panel, and music stool. Thiment is shown in next page.