1851 Great Exhibition: Official Catalogue: Class X.: John Phillips
411. PHILLIPS, JOHN, F.R.S., St. Mary's Lodge, York — Inventor.
An electrophorus, (fig. 1.) which differs from that of ordinary construction, by having metallic conductors through the resin to the base on which it is placed. By this contrivance it is unnecessary to touch with the hand the metallic cover, which as often as it is lifted and replaced will give powerful sparks.
Rain-gauge, (fig. 2.) with one horizontal and four vertical receiving funnels, each furnished with a stopcock. By a simple calculation from the measures of water collected in the funnels after a shower, not only the depth of rain which has fallen, but also the direction in which it came, and the angle of inclination of its descent, become known, These instruments are shown in the cut.
Maximum thermometer, with a separated column of mercury for the index, instead of the wire, which is liable to get entangled in the mercury, and demands a large-sized instrument. By the construction exhibited, these defects are avoided, and the use of the instrument is extended.
Anemometer, for collieries, hospitals, etc. The pressure is received on a semicircular disc, suspended by the diameter, and measured on a graduated arc. By tables calculated for the equation . . . [not copied] . . . the velocity is obtained in terms of the angle.
Air barometer, of very cheap construction, suited to collieries, in which a large scale is desirable for rendering the changes of atmospheric pressure obvious.