OLIVE OIL AND ITS SUBSTITUTES. 



TABLE V. Value <>f butyro-rffractometer degree in 



tin- scale. 



different jmrts of 



From this it will be seen that ten scale divisions from to 10 on this 

 instrument equal 0.0080 in index of refraction, while from 90 to 100 they 

 equal 0.0055. It is evident that if, as shown in Table VII, the change 

 in the refractive index for 1 C. is practically a constant, then the change 

 in the scale division of this instrument for 1 C. must be a variable and 

 will increase as the scale reading increases. This is shown in Table 

 VI, which gives the readings on rape oil. The change for 1 C. 

 decreases as the temperature rises. 



TABLE VI. Variable temperature correction in butyro-refractometer readings. 



Table VII gives the determinations of the temperature corrections 

 of various oils. 



TABLE VII. Temperature corrections for various oils. 



