The outlines of physics: an elementary text-book . ELASTICITY 97. through a hole in the upper bracket. The lower end is attachedto the hook of a 1 kg. weight as shown in the figure. The weight,the hook of which passes through a hole in the lower bracket, keepsthe wire tense. To mark upon the wire two points, the movements of which are tobe observed, take a hair, and loop it around the wire opposite Draw it taut, using a singleknot, then shift it along the wire gentlywith a match end or splinter of wood,until it is within the field of the microscopeand near the (apparently) low
The outlines of physics: an elementary text-book . ELASTICITY 97. through a hole in the upper bracket. The lower end is attachedto the hook of a 1 kg. weight as shown in the figure. The weight,the hook of which passes through a hole in the lower bracket, keepsthe wire tense. To mark upon the wire two points, the movements of which are tobe observed, take a hair, and loop it around the wire opposite Draw it taut, using a singleknot, then shift it along the wire gentlywith a match end or splinter of wood,until it is within the field of the microscopeand near the (apparently) lower end of thescale. Dip the splinter into a shellac solu-tion and touch the knot, which should beon the side of the wire away from themicroscope. As seen in the field of themicroscope, the wire and marker will pre-sent the appearance shown in Fig. 75. ?^- ^? To prevent troublesome oscillation and the turning of the wire, thefollowing device may be employed. It consists of a pulley fastenedto a wooden block. Upon this block isplaced another smaller one. Arou
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectphysics
