72 
DR. T. E. THORPE AND MR. J. W. RODGER ON THE RELATIONS 
Esters. 
Befoj-e introduction into the glischrometer each sample was distilled from a small 
quantity of phosphoric oxide. In every case the boiling-point was almost constant 
during the distillation, and agreed closely with the value found by Young and 
Thomas (‘ Chem. Soc. Trans.’, vol. 63, p. 11.91, 1893). For this reason it was thought 
unnecessary to make determinations of any other physical constants for the purpose 
of gauging the purity of the samples, as the densities of liquid and vapour, the 
critical constants, &c., Imve been carefully determined by Young and Thomas, and 
may be obtained from the paper to which reference has been made. In each case 
we give the boiling-point as found by us, and as given by Young and Thomas 
(Y. and T.). In reducing the observations on viscosity we have employed the values 
of the density found by Young and Thomas, and the expressions for the thermal 
expansion given l)y Elsasser (‘ Liebig’s Annalen,’ 218, 316). 
Methyl Formate. H.COOCHg. 
Boiling-point constant at 31°'87. Bar., 762'6 millims. Corrected and reduced 
b.p. = 31°-78 (31°-8, Y. and T.). 
Observations for viscosity gave :— 
Left limb. 
Risjlit limb. 
O 
Teniji. 
Press. 
Corr. 
V- 
Temp. 
Press. 
Corr. 
>1- 
(•> 
0-,57 
100-17 
-OOOOG6 
-004269 
0-59 
100-09 
-000066 
-004258 
6-.38 
100-11 
-000060 
-004006 
6-40 
100-05 
-000069 
-003992 
10-90 
100-10 
-000072 
-003815 
10-8G 
100-03 
-000072 
-003804 
15-63 
100-03 
-000075 
-003G35 
15-64 
99-96 
-000075 
-003617 
20-15 
99-97 
-000078 
-003476 
20-15 
99-90 
-000078 
-003458 
25-52 
99-94 
-000081 
-003310 
25-52 
99-85 
-000081 
-003286 
29-25 
99-90 
-000083 
-003203 
29 26 
99-81 
-000083 
-003177 
In reducing the observations we have used the value d (0°/4°) = 1’00319 for the 
density, and the expression 
V = 1 -I- -03135824 t -f -0410538 f - -0^18085 
for the thermal expansion. 
Taking 
7^3 = -003190 
^3 = 29°-25 
7^1 = -004263 
b — 0°-58 
7^2 (calculated) = -003688, 
b (from curve) = 13°-67, 
