Viscosity of Solutions. 



223 



luted acid ; these contained respectively 86*2, 83*3, 80*3, and 

 73*4 per cent, of H 2 S0 4 . The viscosities of each of these 

 were determined at temperatures varying between 10° and 

 100°. 



The experimental data are given in the following Tables. 

 By multiplying the numbers in the last column by '027, the 

 viscosity of the particular solution at the temperature of the 

 experiment is obtained relatively to that of water at 20°. The 

 numbers in the fourth column give approximately the effect 

 of the siphon due to the end of the tube, F, being below the 

 level of the centre of the bulb A. 



Table I. — Viscosity of a solution containing 

 " per cent. H 2 0. (A.) 



98 



H 9 S0 4 , 2 



per 



cent. 







Pressure by 









Mean 



Time. 



gauge in mm. 



Siphon 



Total 



pt 



temp. 



Seconds (t). 



of water at 

 15°. 



correction. 



pressure (p). 



1000' 



o 



14-4 



2695 



315-5 



29 



344-5 



929 



22-1 



2020 



316-5 



29 



345-5 



698 



27-5 



1684 



317 



29 



346 



583 



37-5 



1257 



317 



28'5 



345-5 



434 



45-5 



1016 



317 



28-5 



345-5 



351 



55 



802 



317-5 



28'5 



346 



278 



72 



561 



3175 



28'5 



346 



194 



85 



437 



317-5 



28'5 



346 



151 



100-5 



347 



317-5 



28 



345-5 



120 



Table II.- 



-Viscosity of a solution containing 86'2 per cent. 



(B.) 



H 2 S0 4 , 13-8 per cent. H 2 0. 







Pressure bv 









Mean 



Time. 



gauge in mm. 



Siphon 



Total 



pt 



temp. 



Seconds (t). 



of water at 

 15°. 



correction. 



pressure (p). 



1000' 



o 

 14'4 



3107 



317 



28-5 



345-5 



1073 



207 



2392 



317 



28-5 



345-5 



826 



28-2 



1828 



317 



28-5 



345-5 



632 



36-5 



1386 



316 5 



28-5 



345 



478 



455 



1064 



316-5 



28 



344-5 



367 



55 



819 



316-5 



28 



344-5 



282 



70 



578 



317 



28 



345 



199 



100 



335 



317 



27 



344 



115 



85 



428 



317 



27-5 



344-5 



147 



S2 



