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INCLINED PLANE

Posted by on 06-04-2015 in Mechanics

Number in the past inventory 2877 Number in the current inventory 66 INSTRUMENT: INCLINED PLANE Age: beginning of the twentieth century Creator: / Materials: Cast iron, brass, iron Size: (290 x 72) mm State of conservation: Good Information: From the information contained in the old inventory register, found in the school, the instrument is said to have been added to the inventory with the number 2877 on 26th June 1928 priced at 2,550 liras. Description: It’s formed by two horizontal parallel rods (60 x 15; depth 10 ), and one of them is graduated; they are fastened with screws to two supports. One of these supports bends upwards and is connected by two screws to other two rods (576 x 15; depth 5) which are kept parallel by two cylinders (l .77; Ø 6 e Ø 2.5), attached to...

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A COMPENSATION PENDULUM

Posted by on 06-04-2015 in Mechanics

Number in the past inventory 2915 Number in the current inventory 107 INSTRUMENT: A COMPENSATION PENDULUM Age: beginning of the twentieth century Creator: / Materials: Brass, copper, cast iron, iron Size: (140 x 140 x 190) mm State of preservation: Good Information: From the information contained in the old inventory register, found in the school, the instrument is said to have been added to the inventory with the number 2915 on 26th June 1928 priced at 810 liras. Description: A curved rod, attached to a tripod, holds an anchor to which it is possible to suspend a pendulum made up of five bars fixed at their ends to small brass bars and of a disk. The bars placed in an even number position are made of metal and are of a different length unlike the ones placed in an...

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A BALLOON USED TO WEIGH THE AIR

Posted by on 06-04-2015 in Mechanics

Number in the past inventory 2284 Number in the current inventory 73 INSTRUMENT: A BALLOON USED TO WEIGH THE AIR Age: beginning of twentieth century Creator: / Materials: Glass, brass Dimensions: (Ø 160 x 270) mm State of conservation: Good Information: From the information contained in the old inventory register, found in the school, the instrument is said to have been added to the inventory with the number 2284 on 26th June 1928 priced at 1,440 liras. Description: The glass balloon has got a brass collar with a screw cap and a tap to connect it to the air pump which will create the vacuum. The volume of the balloon is of about 3 liters. Use: It allows the measurement of the weight of the air or of a gas contained in the balloon and, once we know the...

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MAELZEL’S METRONOME

Posted by on 06-04-2015 in Mechanics

Number in the past inventory: 2929 Number in the current inventory: 134 INSTRUMENT: MAELZEL’S METRONOME Age: beginning of the twentieth century Creator: / Materials: Wood, iron, plumb, paper. Size: (110 x 110 x 225) mm State of conservation: Good (still working). Information: From the information contained in the old inventory register, found in the school, the instrument is said to have been added to the inventory with the number 2929 on 26th June 1928 priced at 750 liras. Description: The instrument has a quadrangular pyramid wood case with two little supports at the front. By means of a hook you can open the door which has a metal plate with these words written on it: “METRONOME NACH MAELZEL”. (J. Nepomuk Maelzel, 1772-1838 the inventor of this instrument). Inside you can see a graduated tempo scale on paper on a...

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THE BOURDON GAUGE

Posted by on 06-04-2015 in Mechanics

Number in the past inventory 2874 Number in the current inventory 62 INSTRUMENT: THE BOURDON GAUGE Age: beginning of the twentieth century Creator: / Materials: Brass, iron Size: (86 x 170) mm State of conservation: Good Information: From the information contained in the old inventory register, found in the school, the instrument is said to have been added to the inventory with the number 2874 on 26th June 1928 priced at 960 liras. Description: The instrument consists of a metal lenticular section tube with thin walls, and both extremities hermetically closed, completely emptied of air and bent to form almost a circle. One of the extremities communicates with a seal tap which allows the connection to a pneumatic machine, the other one ends with a leverage system connected to a pointer. On the outside there is the action of...

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THE LITTLE DEVIL OF CARTESIO

Posted by on 06-04-2015 in Mechanics

Number in the past inventory / Number in the current inventory / INSTRUMENT: THE LITTLE DEVIL OF CARTESIO Age: beginning of the twentieth century Creator: / Materials: Glass Size: (220×60) mm State of conservation: Good Information: There is no information regarding this instrument in the old inventory register. Description: The instrument consists of a glass test tube closed hermetically by a flexible membrane. The test tube is partially filled with water and inside it there is ”the little devil”. Use: The little devil is full of water and air and floats. With the varying of the pressure, pressing the fingers on the membrane the quantity of water, inside the little devil increases and so the little devil goes down to the bottom. Ceasing the pressure the little devil gets empty and it returns up to the surface (it is...

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DANIELL’S HYGROMETER

Posted by on 06-04-2015 in Mechanics

Number in the past inventory 2898 Number in the current inventory 87 INSTRUMENT: DANIELL’S HYGROMETER Age: beginning of the twentieth century Creator: / Materials: Wood, glass, brass, ether, mercury Size: (Ø 135, high 300) mm State of conservation: Excellent Information: From the information contained in the old inventory register, found in the school, the instrument is said to have been added to the inventory with the number 2898 on 3rd October 1924 priced at 900 liras. Description: This instrument is a reproduction of the condensation hygrometer, invented by the English physic John Frederic Daniell (1790-1845). Is consists of a circular wood base which supports a Celsius thermometer graduated from -25° to +50° for the registration of the air temperature. The thermometer, framed by two small wavy ebony columns, is surmounted by a wood drilled support in which a tube of bent...

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MAGDEBURG’S HEMISPHERES

Posted by on 06-04-2015 in Mechanics

Number in the past inventory 3036 Number in the current inventory 264 INSTRUMENT: MAGDEBURG’S HEMISPHERES Age: beginning of the twentieth century Creator: / Materials: Bronze Size: (120, Ø100) mm State of conservation: Excellent Information: From the information contained in the old inventory register , found in the school, the instrument is said to have been added to the inventory with the number 3036 on 26th June 1928 priced at 900 liras. Description: The instrument consists of two bronze hemispheres with traction handles. The handle of one of them can be unscrewed, allowing the use of the pneumatic machine through a central hole; this hemisphere is provided with a pneumatic seal tap. Use: The instrument is intended to demonstrate the effect of atmospheric pressure on the two hemispheres when they are pushed together and inside them a vacuum is...

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