HEAT OR CALORIC. 



45 



jections, and its diameter in a hole. If it fit these dimensions at the 

 common temperature it will be too large if made red hot, and too 

 small if cooled by ice. 



Cylinder. Length. Diameter. 



An Iron ball just fitting an iron ring so as to pass through it when 

 cold, will not pass when red hot, but when cold will pass as before. 

 L. u. K. 



(6.) A pear shaped glass, thin at bottom, with a perforated cork, 

 containing a long narrow tube, inserted into the neck the glass be- 

 ing filled with a colored fluid, exhibits strikingly the expansion and 

 contraction of fluids ; it is necessary only to heat and cool the ball. 



Alcohol is more expansible than water, but on account of its com- 

 bustibility, care should be taken that none of it is spilled into the 

 fire ; a scale may be attached to the tube, and then the expansions 

 and contractions will be very visible. The thermometer demon- 

 strates the same facts. 



EXPANSION OF LIQUIDS. Dr. Hare. 



Liquids are expanded when their temperature is raised; and some 

 liquids are more expansible than others. 



N 



N 



