66 



Calorimeter, Ice, Bunsen's. A glass calorimeter in which the 

 quantity of heat given out by a body is measured by the 

 determination of the amount of ice melted. 

 Calorimeter, Fuel. Any calorimeter for determination of the 



calorific value of fuels. [4, 17, 21.] 



Calorimeter. Lewis-Thomson. A calorimeter for determining 

 the heating power of coal and indicating the number of 

 parts of water a given quantity of coal is capable of boiling. 

 [15. 17.] 



Calorimeter, Mahler's Bomb. A steel shell or bomb calorimeter, 

 employing oxygen for combustion, used in the determina- 

 tion of the heat of combustion of solids, liquids and gases. 

 Calorimeter, Rowland Wild's. A calorimeter, employing sodium 

 peroxide for combustion, for determining the calorific value 

 of coal. 

 Calorimeter, Rosenhain's. An improved form of Thomson fuel 



calorimeter. [4.] 



Calorimeter, Sarco. A calorimeter on the Mahler's Bomb prin- 

 ciple for the determination of the calorific values of coal, 

 coke, peat, liquid fuels, oils, etc., and producer gas. [13, 15, 

 17.] 



Calorimeter, Simmance-Abady. English standard gas calori- 

 meter for determining the calorific values of gas, oils, spirits 

 etc. [13, 15, 17.] 



Calorimeter. A voltaic battery having large plates and pro- 

 ducing powerful heating effects. 

 Cambridge Extensometer. See Extensometer. [4.] 

 Cambridge Flow Recorder. See Flow Recorder. [4.] 

 Cambridge Measuring Microscope. See Measuring Microscope. 



[4.] 



Cambridge Optical Pyrometer. See Pyrometer. [4, 21.] 

 Camera, Photographic. An apparatus having a chamber, usually 

 a box with lenses at one end and a sensitised photographic 

 plate or film opposite for taking photographs. [3, 8, 9, 15, 

 16, 17, 20, 21, 22, 26.] 



Camera-Lucida. An instrument which, by means of a prism 

 or mirror, causes an apparent image of an external object 

 to appear as if projected upon a surface, as of paper or 

 canvas, so that the outlines may be conveniently sketched. 

 It is frequently used with the microscope. [2, 3, 15, 17, 20, 

 21, 22, 26.] 



Camera-Obscura. An apparatus in which the images of external 

 objects formed by a convex lens and a prism or concave 

 mirror are thrown on a paper or other white surface in the 

 focus, within a darkened chamber or box, so that they may 

 be sketched or observed. [3, 17, 20, 26.] 

 Campbell Stokes's Standard Sunshine-Recorder. See Sunshine- 

 Recorder. [3, 5, 6, 17, 20, 21, 25, 26, 27.] 

 Camptometer. A form of cross staff head for laying out camps. 

 IIS, 21.} 



