506 
MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
Methyl Propyl Ketone. CHg.( 0113 ) 3 .CO. CHg. 
A sample lent to us by Dr. Japp was placed over anhydrous copper sulphate 
and submitted to fractional distillation, and eventually a portion was obtained 
boilinsf between 102°‘25 and 102°‘55. Bar. 775'4 millims. Corrected and reduced 
b,p. = 101°-7. 
Determinations of its vapour density gave (1) 42'97 ; ( 2 ) 42‘78. Calculated 43'00. 
Observations for viscosity gave :— 
Left limb. 
Right limb. 
_ _ 1 
Temp. 
Press. 
Corr. 
V- 
Temp. 
Press. 
COTT. 
V- 
0 
0-41 
100-49 
-000037 
•006400 
0 
0-35 
100-41 
-000037 
•006409 
9-.34 
100-45 
•000041 
•005697 
9-46 
100-35 
•000041 
•005688 
18-.30 
100-42 
•000045 
•005108 
18-30 
100-34 
•000045 
•005111 
27-79 
100-39 
•000049 
•004589 
27-76 
100-32 
•000049 
•004594 
35-44 
100-38 
■000053 
•004231 
35-42 
100-32 
•000053 
■004237 : 
45-27 
100-33 
•000057 
•003829 
45-31 
100-25 
•000058 
■003832 
53-90 
100-29 
•000062 
•003525 
53-98 
100-24 
•000062 
■003525 
62-26 
100-19 
•000066 
•003261 
62-23 
100-11 
•000066 
•003262 
72-79 
100-62 
•000071 
•002979 
72-69 
100-58 
•000071 
•002982 
80-65 
100-51 
•000075 
•002785 
80 63 
100-44 
■000075 
•002788 
90-08 
100-49 
•000080 
•002574 
90-04 
100-41 
•000080 
•002573 
98-78 
100-50 
■000084 
•002399 
98-77 
100-40 
•000084 
•002401 
In reducing’ the observations we have adopted Pepkin’s value d (15°/15°) = 0'8124 
(which gives diKjP) = 0‘8258) for the relative density, and the expression 
V = 1 + •03113087^ + • 0521255 ^" + 
for the thermal expansion (Thorpe and L. M. Jones, loc. cit.). 
Taking 
7 ^^ = ’006404 773 = '002400 173 (calculated) = ’003920 
— 0°’38 ^3 = 98°’77 C (from curve) = 43°’00, 
we obtain the formula 
51-543 
~ (137-75 + ’ 
which mves the followincf calculated values : 
