What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
action angle angle of incidence attraction axle battery beam bell blow boiling bottom called carbon center of gravity circuit cohesion coil colors compressible concave lens concave mirror conductor convex lens cord cylinder Describe diaphragm direction disk distance earth effect electricity energy equal exert experiment fall fastened feet finger force fulcrum galvanometer gases glass hand heard heat inclined plane induction instrument length lever lifted light liquid machine magnet mercury metal molecules motion NATURAL PHILOSOPHY needle north pole object pass pendulum piece piston plane plate power and weight pressure produce property of matter pulley pulling pushed rays reflected refraction resistance rest sealing-wax shown in Fig shows soft iron solid south pole spring back steam stone straight line string substances surface temperature thrown tion tricity tube upward velocity vessel waves wheel wire wood
Page 241 - There is an equilibrium upon the wheel and axle when the power is to the weight as the radius of the axle to the radius of the wheel.
Page 123 - ... once reflected. Hence proceed the different colours of the rainbow : they are seven in number, and appear in the following order; red, orange, yellow, green, blue, indigo, and violet. These colours appear the more vivid as the cloud-s which are behind are darker, and the drops of rain fall closer.
Page 69 - After several months spent at sea," he says, " in a long passage from South America to Asia, my pocket chronometer and others on board announced one morning that a certain point of land was then bearing north from the ship, at a distance of fifty miles ; in an hour afterwards, when a mist had cleared away, the looker-out on the mast gave the joyous call of ' Land ahead ! ' verifying the report of the chronometers almost to one mile, after a voyage of thousands.
Page 218 - In the screw, an equilibrium is produced when the power is to the weight, as the distance between two contiguous threads is to the circumference of the circle described in one revolution of the power.
Page 241 - These are usually accounted six in number, viz. the Lever, the Wheel and Axle, the Pulley, the Inclined Plane, the Wedge, and the Screw.
Page 241 - ... when the power is to the weight as the height of the plane is to its length...
Page 142 - If there is a piston moving freely inside of a cylinder, and then if steam is let into the cylinder, first at one end and then at the other...
Page 7 - ... at the bottom of the page or the back of the book, in fine print and compact lists.
Page 108 - Yet the law of reflection is not transgressed. Every ray must be thrown in such a direction that the angle of reflection is equal to the angle of incidence.