Fig. 3.

Hall's Astronomical and Meteorological Clock.

fastened to the arbors of the first wheels of the train, and which revolve (upon the average) once in three hours. Bb are the escape wheels of the train, of the same kind as the clock (the vertical dead beat), of 25 teeth. c is the going barrel to impel the two independent trains. Dd is the thermometer and barometer. E is the rod to which is fixed the marking apparatus in connexion with the revolving cylinders A a. F is the escape hour-wheel of 24 pins, with a barrel to receive the chain of the rod E. G is a wheel with a logarithmic spiral, the groove of which receives the pin of the bar H.

I is the clock-frame. The action of this entirely new invention is as follows:-D d, the thermometer and barometer, are made to vibrate continually by the escapement Bb, as inverted pendulums; the radii of the gyrations of which are continually affected, either by the pressure of the atmosphere, or by the change of temperature: thus d, the Torricellian barometer, will, if the mercury fall one inch, increase the number of its vibrations per hour by 1,000, every one of which is registered on the revolving cylinder A, which gives a line in length equal to the number of vibrations given by the barometer d per hour; a similar effect is produced by the thermometer D, by any change of temperature, and its variation registered on A. The hourly measure is marked by breaking the lines, which is effected by the escape of the wheel F, and the descent of the rod E, with its attached apparatus.

Patent diplometer for railway purposes; the tickets are stamped with the date and the number of tickets issued, with the amount paid.

62 HINTON, CHARLES, 10 Corporation Lane, Clerkenwell -Designer and Manufacturer.

English hard white enamel watch dial, with sunk centre and seconds, allowing free motion of the hands, with a flatter glass than usual.

64

JONES, JOHN, 338 Strand-Manufacturer. Gold and silver watches of peculiar construction. No. 1. The Rose Watch, showing Time and its doings. On one half of the margin around the back is engraved, on blue enamel, "Man cometh forth as a flower, and is cut down." On the surface of the richly engraved gold back is a Maltese cross, in white enamel, and on its four limbs are depicted the four seasons of life-in the bud, blossom, decay, and death of a rose. On the other half of the margin is engraved, "It is sown in dishonour, it is raised in glory." The dial represents, in enamel colours, the rose window of Westminster Abbey. On the twelve compartments indicating the twelve hours, are the names of the twelve Apostles. On the bezil that holds the glass is engraved, in blue enamel, "He that taketh not his cross daily is not worthy of me."

No. 2 shows, when viewed through a magnifying power, a series of cubical crystals, that being the primary crystal of gold.

No. 3 is a new and simpler mode than hitherto employed of producing dead seconds, with sunk centre in the dial, also a novelty.

No. 4 shows comparative merits of English and foreign work at equal prices.

No. 5. Centre seconds hunter with compensation balance, isochronal spring, and lever escapement.

66 A MOORE, Major W., 3 Cornish Terrace, Rathmines, Dublin-Inventor.

A surgical instrument for use previous to operation for lithotrity, &c.

67 MACDOUAL, E. J., 12 Dorset Place, Pall Mall East -Inventor and Manufacturer.

Patent escapement for chronometers, watches, and clocks, without escape wheel. The same spring by Indiarubber.

Drill-stocks: Archimedean; centrifugal Archimedean; vibrating; and duplex, simple, and centrifugal. A new method of converting rectilinear into rotary motion.

A new decomposition cell. Medals made by the pro

cess.

68

MACDOWALL, C., 4 Hyde Street, Bloomsbury

Inventor. Clock-movement, with a dead escapement of a new construction, in which the escape-wheel consists merely of a small disc, with a single pin in it. The parts are arranged for the purpose of exhibiting the action of the escapement. The advantages claimed are- the impulse takes place at the middle of the vibration of the pendulum, as in the common dead escapement; it is given chiefly by direct action instead of oblique, and requires little oil; the construction is easy, and may be made with a ruby for the escape-pin as cheaply as with a common recoil escapement. It is applicable to watches as well as clocks.

69

(E. J. Dent, Manufacturer and Patentee, by assignment.) MAPPLE, D. D., 17 Hull's Place, John's Row, St. Luke's-Producer and Designer. Registered skeleton timepiece, with improved lever escapement.

70

Improved clock-winder.

DAVIS, J., 119 High Holborn-Inventor and
Manufacturer.

An instrument, on a new principle, to survey without calculation.

73

PAYNE, WILLIAM, & Co., 163 New Bond Street-
Inventors and Manufacturers.

Quarter clock, on eight bells, in Amboyna wood, and or-molu case, made for the Sultan of Turkey.

Timepieces, in buhl and or-molu case; and in tulip wood and or-molu case.

Clocks, with lever escapement, in engraved gilt case with patent musical chimes; and in black marble case, with half dead beat-escapement.

Small carriage clock, with lever escapement. Astronomical clock, with chronometer escapement, perpetual day of month, moon's age, noon and night, day of week, repeat hours and quarters, and zodiacal signs, in engraved gilt case.

Timepiece in square buhl case.

Clock, in square rosewood case, with lever escapement. Lever timepiece, in satin-wood case.

Small clock, in rosewood case, with patent musical chimes.

Half-regulator, in mahogany case, new style. Small timepiece, with thermometer. Clock, in ebony case, with silvered ornaments. Clock with or-molu ornaments, old English style. Patent pedometer, for measuring walking distances; pedometer attached to a repeating watch, with patent winding, showing seconds and day of month.

Odometer, for measuring carriage distances.

74 RIX, ISAAC, 21 Conduit Street, Westbourne Terrace -Inventor.

Skeleton chronometer time piece, slow motion, beating only once in three seconds; the escapement so contrived as to allow the pendulum to vibrate two seconds every

beat without touching anything; a perfectly dead escape.

78

Gold hunting watch, with ornamented and engineturned case.

Silver lever watch, as used in Turkey. Horizontal movement, jewelled in five pair of holes; extra chronometer-balance, adapted to all climates. Left-handed movement, extra-jewelled, gold balance. Silver hunting and plain watches.

Railway guards' timepiece, secured in case.

79 GILLETT, W. S., Upper Harley Street-Inventor. Models of a system of thin rings or discs of metal, which being conical or disked, may by pressure be shortened, and thereby extended either inwards or outwards; applicable to pistons, stuffing-boxes, and other similar purposes; also to the construction of hollow cylinders to bear pressure from within.

80

THOMSON, ADAM, 25 New Bond Street-Inventor
and Maker.

Autochronograph: for the instantaneous marking or printing of time, giving the month, day, and hour (night and day), with the minutes and portions of minutes.

The machine requires setting but once a-month. The clock must be wound once a-week. The register may be extended to any required length, and the date, with the exact time, may be stamped or printed in one second of time.

The attendance of guards and of workmen can be correctly noted; and the presence or substitution of particular individuals can be known by their signature upon the register.

The commencement and duration of any event can be correctly registered within a few seconds of time, and all the work of a " time-clerk" correctly done. Provisionally registered.

85A WATKINS, A., 7 Weymouth Terrace, City Road -Inventor and Manufacturer. Original eight-day chronometer, striking the hours; being a self-acting repeater, chiming the quarters upon a set of five bells, and showing the day of the month; each set of works detached; the whole comprising 200 pieces of mechanism in a diameter of not more than two inches.

Chronometers of three-quarter plate construction, with hard cylindrical springs, jewelled with rubies in every hole; presumed to be the smallest ever made of the same construction, the diameter being nearly that of a guinea.

86 COUSENS & WHITESIDE, 27 Davies Street, Berkeley

Square-Inventors and Manufacturers.

determining the time to one-sixth of a second, by means A sporting watch, the novelty of which consists in its

of an independent hand acting from the centre, and detached from all the other hands, with stopping and starting springs. It has a detached lever escapement, is jewelled in 14 holes, and is particularly adapted for racing and other purposes. It may be considerably re

[10.]

87 ALLIS, J. H., Bristol-Inventor and Manufacturer.

Bracket-regulator timepiece, with a new description of compound pendulum, which vibrates seconds, though less than half the length of a usual seconds pendulum. Adapted for compensation against the effects of heat and

cold.

VIEYRES & REPINGON, 129 Regent Street-
Manufacturers.

Two-day marine chronometer, in temporary gimbals, for the convenience of exhibition.

Gold and silver watches, of various fashions, for the home trade and for South America.

Steel for chronometer pendulum springs, by A. Ganeral.

95 MOUILLARD, PIERRE FORTIME VICTOR, 71 Albany Street, Regent's Park-Inventor.

The artificial leech. It is composed of a body of cylindrical form, about three and a quarter inches long, and about one inch in diameter. Towards the bottom end is a small cylinder, slightly flattened at its lower part, containing a small spoon of about two-thirds of an inch of elevation on its upper part, the opening of which is slightly oblique, of an oval form. This tube, including the spoon, is about two inches long by about half an inch in diameter. The other extremity of the body of the pump is furnished with a piston, which, on being drawn back, empties the pump. This piston, being entirely drawn out to its full length, and pressed by the thumb, releases an interior spring in which the lancets are fixed, and these pierce the skin raised by its suction. The operation is not painful, as the lancets do not remain an instant in the wound.

95A BRISCALL, JAMES, 48 Constitution Hill, Birmingham -Designer and Manufacturer.

Self-correcting clock, with a detached lever escapement; it goes a month; and shows the day of the week and month. At the end of each month, and in leap-year, it corrects itself.

96 BRUTTON, CHARLES, Exeter-Proprietor.

A clock, in a case, which occupied thirty-four years in its completion. The movements are as follow:-moving panorama of Day and Night; Day represented by Apollo in his car drawn by four coursers, accompanied by the twelve Hours; and Diana in her car, drawn by stags, attended by the twelve Hours, representing Night. Two figures which salute each other, as the panorama revolves, and the bells are ringing. Perpetual almanac, showing the day of the month on a semicircular plate, and the equation of time, regulated only once in 130 years. Circle, the index of which shows the day of the week, with its appropriate planet. Circle showing the leap-year, the index revolving only once in four years. The sun in his course, with the correct time of rising and setting by a horizon receding or advancing as the days shorten or lengthen; and the moon, showing her different quarters, age, &c. Two female figures, one on each side of the dial-plate, representing Fame and Terpsichore, which move in time when the organ plays. Movement regulating the clock as a repeater. Saturn, the god of time, who beats in movement when the organ plays. Circle on the face, showing the tunes played by the organ every four hours. Belfry, with six ringers. Bird organ, which plays when required. This clock is shown in the annexed Plate, 33. It was made by Jacob Loudan.

99

CHURCHILL, GEORGE, Downton, near Salisbury-
Manufacturer.

An eight-day spring-clock, with music attached, playing a tune every three hours: cast and manufactured by a blacksmith.

100

DELL BROTHERS, Bristol-Inventors and

Manufacturers.

Specimens of ordinary clock-work. Transparent timepiece for the bed-room: a small light is placed behind the dial, showing the time distinctly; the time-piece has a lever escapement, going two days.

Specimens of iron and brass wheel-cutting, for clockwork, lathe-work, &c.; and wood-pattern cutting, for cast-iron and other wheels.

Pianoforte music-box, playing six overtures, made by Nicole Freres, of Geneva.

102 DRIVER, J., Silver Street, Wakefield—Designer and Manufacturer.

Chime-clock, showing simultaneously upon the dial the time in any part of the world.

A compensating clock, with a lever escapement, and without pendulum.

104

EDWARDS, JAMES, Stourbridge.

Large transparent skeleton spring timepiece, made of a combination of brass and glass: the wheels consist of cut flint-glass centres, hooped with brass teeth rims, engraved glass dial-plate, and crystal cut pendulum ball; it goes eight days.

New skeleton quarter-day spring timepiece, made of cut flint-glass centres, hooped with brass teeth rims, having engraved glass dial-plate, and glass pendulum ball; it goes three months, and is kept in motion by a new clockmovement propeller.

104A GRAY, JAMES, Dr., Perth--Inventor.

catheter, a test tube and test paper, a pair of forceps, a Medical walking-staff, containing an enema-syringe, a number of wax matches, and a pill-box, divided, containing in each division pills of various medicines.

"Spherical-trigonometer," or an instrument adapted to the mechanical solution of problems in spherical trigonometry and nautical astronomy.

Portable, or field transit instrument, for finding the time on shore, laying down meridian lines, &c. Water-meter, for registering the quantity without interrupting the pressure.

Clock, with conical pendulum.
Marine clock, with two pendulums.

A centrifugal, or conical pendulum clock; capable of performing much heavy work with great accuracy. 113 HART, WILLIAM, & Co., Christchurch, Hants— Manufacturers.

Chronometer and watch fusee chains, of different sizes. 115 LAWRENCE, I., North Curry, near Taunton

Inventor.

Sun-dial, to suit any latitude in the northern hemisphere. Hand-drill. Turner's centre, with friction rollers. Spring screw-wrench. Dividers.