BETWEEN THE VISCOSITY OF LIQHIDS AND THEIR CHEMICAL NATURE. 44) 
isomerism, molecular complexity, and, generally speaking, of changes in tlie composi¬ 
tion and constitution of chemical compounds upon viscosity, we drew up a scheme of 
work which has involved the determination in absolute measure of the viscosity of 
some seventy liquids at all temperatures between 0 ° (except in cases where the liquid 
solidified at that temperature) and their respective boiling-points. 
This list is as follows :— 
Water.H,0. 
Bromine.Biq. 
Nitrogen peroxide.N 3 O 4 ,. 
Paraffins and UnsoAnrated Fatty Hydrocarbons. 
Pentane. 0113 .( 0112 ) 3 . CHg. 
Isopentane.( 0 H 3 ) 30 H. 0 H 2 . 0 H 3 . 
Hexane.OH 3 ,(OH 3 )^.OH 3 . 
Isohexane.( 0 H 3 ) 20 H.( 0 H 3 ) 2 . 0 H 3 . 
Heptane. 0 H 3 .( 0 H 2 ) 3 . 0 H 3 . 
Isoheptane.'.( 0 H 3 ) 20 H.( 0 H 2 ) 3 . 0 H 3 . 
Octane. 0 H 3 .(CH 2 ) 3 . 0 H 3 . 
Trimethyl Ethylene (; 8 -isoamylene). . . . ( 0 H 3 ) 20 ; 0 H. 0 H 3 . 
Isoprene (Pentine).CgHg. 
Diallyl (Hexine).OH 3 :OH.(OH 2 ) 2 . 0 H:OHo 
Iodides. 
Methyl iodide.. . . . . 
Ethyl iodide. 
Propyl iodide. 
Isopropyl iodide. 
Isobutyl iodide. 
Allyl iodide. 
OHgl. 
OHg.OIEL 
OH3.OH2.OH2I. 
{CR,),cm. 
(OHgjoOH.OHoI, 
OH2:OH.OH2l. 
Bromides. 
Ethyl bromide. 
Propyl bromide. 
Isopropyl bromide. 
Isobutyl bromide......... 
Allyl bromide. 
Ethylene bromide. 
Propylene bromide. 
Isobutylene bromide. 
Acetylene bromide. 
MDOCCXCIV.—A. 3 L 
OHg.OH.Br. 
OHg.OH^.OH.Br. 
(0Pl3).20HBr. 
(OHgjsOH.OHaBr. 
OH.,:CH.OH,Br. 
OHsBr.OHoBr. 
OHg.OHBr.OHsBr 
(0Pl3)20Br.0H2Br. 
OHBmOHBr. 
