650 
MESSRS. T. E. THORPE AHD J. W. RODGER OH THE RELATIOHS 
Molecular Viscosity at Slope '0^987. 
Observed. 
Calculated. 
Difference 
per cent. 
Octane. 
2055 
2028 
1-3 j 
Ethyl iodide. 
1494 
1510 
-PO 
Propyl iodide. 
1734 
1741 
-0-4 
Isopropyl iodide. 
1714 
1701 
0-8 
Isobutyl iodide. 
1897 
1932 
-1-8 
Allyl iodide. 
1642 
1661 
-1-1 
Isohutjl bromide. 
1755 
1687 
3-9 
Ethylene bromide. 
1828 
1854 
-1-5 
Projiylene bromide .... 
2043 
2085 
-2-0 
Isobutylene bromide .... 
2270 
2276 
-0-3 
Acetylene bromide. 
1713 
1774 
-3-6 
Ethylene chloride. 
1401 
1402 
-OT 
Methyl propyl ketone .... 
1535 
1.537 
-OT 
Diethyl ketone. 
1.539 
1537 
0-1 i 
! 
Formic acid. 
883 
933 
1 
— 5*6 
Acetic acid. 
1188 
1164 
20 
Propionic acid. 
1439 
1395 
3-1 
Butyric acid. 
1671 
1626 
27 
Isobutyric acid. 
1665 
1586 
4-7 
Acetic anhydride. 
1595 
1628 
-20 
Pi'opionic anhydride .... 
1976 
2080 
-5-3 
Benzene . 
1299 
1335 
-2-8 
Toluene. 
1572 
1566 
0-4 
Ethyl benzene . 
1820 
1797 
1-3 
Ortho-xylene. 
1806 
1797 
0-5 
Meta-xylene. 
1794 
1797 
-0-2 
Para-xylene. 
1796 
1797 
0-0 
In the above table the agreement of calculated and observed values is practically 
the same as it was at the smaller slope, the mean percentage difference being Iff. 
The largest differences, as at the smaller slope, are given by the acids and propionic 
anhydride. In the following table those liquids are compared which were not 
employed in deducing the fundamental constants. The calculated values are obtained 
in the same way as already indicated at slope •04.323, 
