Pike's Illustrated Descriptive Catalogue of Optical, Mathematical and Philosophical Instruments: Manufactured, Imported, and Sold by the Author ; with the Prices Affixed at which They are Offered in 1848 ...Published and sold by the author, 1848 |
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294 BROADWAY 66 pint achromatic apparatus armature ball barometer battery binding screws brass brass pillars bulb centre coil colors compasses compound concave condensing consists convex lens copper wire cups cylinder Dew Point ditto double electrical electro-magnet eye glasses feet fluid forceps gallon galvanic German silver glass tube globe graduated heat holder hole hydrogen hygrometer inch inch diameter inches long insects instrument insulated ivory lamp lenses Leyden jar light liquid machine magic lantern magnet magnifier mahogany mahogany frame matrass mercury metal microscope mirror motion mounted movable needle pair pass piece PIKE placed plate polariscope poles Price prism quantity quart retort revolving rosewood round scale side silver springs six inch sliders soft iron spindle spirit level spring stand steel stop-cock supported surface telescope temperature theodolite thermometer tourmaline twelve inch vapor vessel views weight wheel zinc
Popular passages
Page 144 - ... which at the lower part is a glass tube with an attached scale. The, water stands at the same height in the cylinder and glass tube, and being visible in the latter, the height is read immediately on the scale ; and the cylinder and tube being constructed so that the sum of the areas of their sections...
Page 118 - ... 6. In fair weather, when the mercury falls much and low, and thus continues for two or three days before the rain comes, then expect a great deal of wet, and probably high winds.
Page 131 - ... body in the least degree colder than itself. The difference, therefore, between the temperature of the air, and the temperature of the water in the vessel when the dew begins to...
Page 146 - The use of the small tube of communication ab, fig. 5, is to check the undulation of the water, so that the height of it may be read off from the scale with ease and certainty. But it is particularly designed to prevent the water from being thrown up to a much greater or less altitude, than the true height of the column which the wind is able at that time to sustain, from its receiving a sudden impulse whilst it is vibrating either in its ascent or descent.
Page 219 - The Diurnal Motion of the Earth, showing the Rising and Setting of the Sun, illustrating the cause of Day and Night, by the Earth's Rotation upon its Axis.
Page 117 - Upon the level of the surface of the earth, the limits of the height of the mercury in the tube above the surface of the mercury in the...
Page 143 - ... for receiving the snow, rain, or sleet that may then fall. This vessel must have its opening exactly equal to that of the rain gauge, and widen downwards to a sufficient depth, with a considerable slope. It should be placed where nothing can obstruct the descending snow from entering, and where no drift snow can be blown into it.
Page 43 - No. 1 is suspended against the wall in one room, while a person in the adjoining one receives the shock, by grasping the handles of the helix, and approaching it to the spot opposite to which the coil is suspended. The effect is as if by magic, without a visible cause. It is best produced through a door, or thin wooden partition.
Page 11 - ... it reaches the middle of the magnet ; but there it seems inclined to stop ; and then, after a few oscillations, it settles, as in a position of equilibrium: for if purposely displaced by bringing it forwards towards the other pole, it returns with a force which shows that it is repelled from that other pole. Let us now withdraw the magnet, and turning it half round, so that its poles are in directions the reverse...
Page 118 - When foul weather happens soon after the falling of the mercury expect but little of it ; and on the contrary, expect but little fair weather when it proves fair shortly after the mercury has risen.