1851 Great Exhibition: Official Catalogue: Class X.: Somalvico and Co
681A. SOMALVICO and CO., Hutton Garden.
Wheel barometer; ornamental gilt frame, improved porcelain plates.
Barometer in papier mache inlaid with pearl; ebony sides.
Standard pediment barometer, with extra large tube, and improved glass cistern showing the rising and falling of the mercury in the tube.
Improved mariner's barometer; combined marine tube, syphon tube, and hygrometer, to indicate the changes quicker than the ordinary marine barometer; making a complete and sensitive instrument for ascertaining the variations of the atmosphere correctly.
New syphon pedestal, or pocket barometer, 8 inches long.
Improved engineer's guide gauges, combined with barometer for correction.
Vacuum steam-pressure gauge, on a new principle: a great improvement on the former; prevents the water mixing with the mercury.
Steam-engine indicator: for showing the working quality of the exhibitors' patent brewers' liquid prover; requires no tables.
Engines, walking-stick telescopes, with compass and hygrometer, and with double eyeglasses to spring out of the stick.
Improved sextant, with patent universal lunar lamp, which may be set to any angle, the observer being able to read off the sextant during rough weather or at night.
Solid limb sextant.
Model representing the circulation of the blood.
Improved self-generating coffee-pot, and for producing hot water in a few minutes, with an extinguisher which puts out the flame of the lighted spirit at any moment required; and portable cistern for travelling.
Case of mathematical instruments, etc.