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School Spano |
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Function To show the functioning of the slide-rule |
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Description Two meter length model with numeration and graduation visible from a distance. | |||
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Function The model is made in hard wood and we can use it as a model of the vernier. |
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Description The scale and the vernier have the centrimetic division visible from afar. The length is 50 cm. | |||
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Function To measure small distances. |
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Description The screw is grinded along the whole length. The surfaces are perfectly flat. The micrometer has a ratchet jack for its progress. | |||
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Function For precision measure of angles. |
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Description It is formed by an astronomical telescope with an air-level and a grating, and by two graduated circles. The mobile side of a circle rotates with the telescope on a vertical plane; the internal border of the other rotates, with the inner side of the instrument, on a horizontal plane. Two air-levels are placed on a platform. The telescope can be easily divided from its binding and we can use it separately. | |||
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Function To measure masses. |
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Description The balance has two circular brass pans and a wooden frame. The measure is made by comparing the mass of the body and that of the weights. The equilibrium condition is visible in front. | |||
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Function For precision measure of masses. |
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Description The balance is inside a mahogany glass case with hinged lateral doors and a balanced frontal door. It is provided with a triple stop for the beam, the suspension system and the pans. It has a pneumatic device for the oscillation. The loading of the weight fraction is made from the outside. Hanging load gr. 200, sensibility mg 0.1. | |||
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Function To study the buoyancy. |
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Description The balance lies on a wooden basis with four brass feet adjustable in height. The hollow brass column ends with a cradle to contain the beam and the fulcrum of the balance. On the front of the basis stands a lever to block and unblock the beam. The equipment is provided with normal pans and pans with hook besides a double cylinder for the experience of Archimedes. | |||
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Function To measure the density of a liquid or a solid. |
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Description With this type of balance we can measure the density of a liquid. With riders, placed opportunely on the rider scale, we compensate the decrease of the weight of the plummet when it is completely immersed in the liquid. Using a liquid with known density, we can determinate the decrease of the weight of a body immersed in the liquid and consequently the volume of the body. This balance can also be used to determinate the density of the solid bodies. | |||
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Function To measure the forces. |
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Description A spring placed inside a metallic cylinder is welded to the closed end. The other end of the spring is welded to a handle. Another handle is welded to the closed end of the cylinder. An index shows the intensity of the applied force. | |||
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Function It is used to show the functioning of the pendulum clocks and for measuring the time. |
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Description The quadrant is graduated in white on black. When the pendulum is regulated to strike the second in a complete oscillation, the model is used to count half seconds. | |||
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Function To register the number of revolutions of a rotating machine. |
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Description The model can be used up to a thousand turns. | |||
