1851 Great Exhibition: Official Catalogue: Class X.: J. Newman
674 NEWMAN, J., 122 Regent Street — Inventor and Manufacturer.
Standard barometer. The frame consists entirely of metal; the cistern, when required for long journeys, is all of iron, so arranged as to be made portable for travelling, by the lower part shifting a quarter of a turn; thus obviating the objection so long made to the wood cistern and leather bag. The scale is marked off from an authentic standard scale (verified by the late Mr. Baily), and terminates in a point; it is capable of being adjusted with great accuracy to the surface of the mercury in the cistern, and when the vernier at the upper part of the scale is adjusted to the surface in the tube, the exact length of the column of mercury is in this way measured; the diameter of the tube is 0 .6.
Portable mountain barometer; consists of a metal frame, with the iron cistern similar to the standard barometer, and has all the data marked on it for the corrections, for reducing the observations to those of the standard barometer.
Standard thermometer, divided to fifths of a degree. Maximum and minimum register thermometers. Maximum thermometer, with black bulb for solar radiation.
Minimum thermometer in the focus of a mirror, for terrestrial radiation.
Daniell's dew-point hygrometer.
Mason's wet and dry bulb hygrometer.
Lind's wind gauge.
The foregoing meteorological instruments are described by the Committee of Physics and Meteorology, in their Report published by the Royal Society, and made by the exhibitor for the various magnetic observatories.
Usual copper rain gauge, with accurately turned circle 12 inches diameter.
Howard's rain gauge and evaporator.
Sykes' thermometer and boiler, for measuring heights by the boiling point.
Miners' safety-lamp, as made for Sir H. Davy.
Miners' safety-lamp, as improved by the exhibitor.
Improved air-pump with metallic valves, and ground glass plate, which exhausts to within 1/20th of the Torncellian vacuum.
Rain and wind gauge, contrived to register the quantity of rain and direction of the wind, at the precise time, on a cylinder which has motion given to it by a clock; the register paper is replaced at the end of each month.
Self-registering tide-gauge; consists of a cylinder, moved by means of a clock 1 inch to the hour, and a pencil moved by the float 1 inch to the foot. The pencil, by being attached to a chain carried over two small brass cylinders, the one containing a spring, is so contrived that there is no loss of time in marking the change of the tide; so that the exact moment of the commencement of its rise or fall, is registered, and its progress for every portion of time, from the highest to the lowest point, is traced on the paper. The paper for this instrument was laid down by the Admiralty, and is used with metallic pencils. On the face of the clock is shown the height of the tide during observation, and it also registers the highest and lowest for the day.