1743. Boyle's Law with Air Thermometer (Jolly's Air bulb) Charles Law Apparatus
As it combines two pieces of apparatus into one simple economical unit, this assembly has become a popular item. Complete with heavy spray painted base having levelling screws, 2 glass tubes Jolly's bulb attachment.
 

1744. Pullinger's Co-efficient of Linear Expansion App. :
Consisting of iron tube with inlet & outlet tubes for steam and opening for thermometer, supported in frame or metallic stand Complete with steel rod, without spherometer. Iron pipe all joints welded.
a) Iron pipe ½ meter
b) Iron pipe 1 meter.

1745. Pullinger's Apparatus :
With three metal rods Aluminium brass and iron. ½ meter & 1meter iron pipe.

1746. Pullinger's Co-efficient of Linear Expansion Apparatus :
As above consisting of ½ meter long brss tube N.P. with pucca welded inlet and outlet tubes for steam. and opening for thermometer, supported in fine wood polished frame/ metalic stand with one steel rod.

1747. Pullinger's Apparatus :
Brass pipe and with 3 metal rods, Aluminium, brss and iron ½ meter long
b) Pullinger's Apparatus : as above with brass pipe 1 meter long.

1748. Ring and Ball, Brass
Gravesande's with handle and chain medium size.

1749. Searle's Thermal Conductivty Apparatus.
It consists of cylindrical copper rod about 30cms. long x 3.7cms. dia. with its one end surrounded by a steam jacket for heating it from a boiler and the other end is kept cool by a stream of water flowing through a spiral tube attached to that end. Through two sockets two thermometers are inserted in the rod for finding the temperature at two points. Two more thermometers are inserted through rubber corks for finding the difference of themperature between the inflowing and outflowing water. Fitted in teakwook case pacded with felt with removable front, without thermometers.

surrounded by a steam jacket for heating it from a boiler and the other end is kept cool by a stream of water flowing through a spiral tube attached to that end. Through two sockets two thermometers are inserted in the rod for finding the temperature at two points. Two more thermometers are inserted through rubber corks for finding the difference of themperature between the inflowing and outflowing water. Fitted in teakwook case pacded with felt with removable front, without thermometers.

1750. Searle's Thermal Conductivity App. 30 cms. x2.5 cms.

1751. Conductivity Apparatus Lee's and Charlton's :
For determining the relative conductivity of thin layers of material consisting of cylindrical slab of Brass 11 cms. in diameter and 12mm. thick. On theis rests a 45mm deep hollow cylinder brass N. P. of same diameter with inlet and outlet tubes for Steam. Both the cylinders have radial holes for insertion of thermometers. The material under test is placed between two cylinders. The apparatus is suspended by strings attached to the lower cylinder without thermometer. Complete with one each specimen disc of glass, & ebonite/hylam but thermometer

each specimen disc of glass, & ebonite/hylam but thermometer

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