224 



Mr. R. F. D'Arcy on the 



Table III. — Viscosity of a solution containing 83*3 per cent. 

 H 2 S0 4 , 16-7 per cent. H 8 0. (0.) 







Pressure by 









Mean 



Time. 



gauge in mm. 



Siphon 



Total 



pt 



temp. 



Seconds (t). 



of water at 

 15°. 



correction. 



pressure ( p). 



1000' 















12 



3139 



316-5 



28-1 



344 6 



1080 



25 



1883 



317 



28 



345 



650 



353 



1322 



317 



28 



345 



456 



47-2 



929 



317 



27-5 



344-5 



320 



56-5 



7405 



317 



27-5 



344-5 



255 



663 



588-5 



317-5 



27 



344-5 



203 



Table IV. — Viscosity of a solution containing 80*3 per cent. 

 H 2 $0 4 , 19-7 per cent. H 2 0. (D.) 







Pressure by 









Mean 



Time. 



gauge in mm. 



Siphon 



Total 



pt 



temp. 



Seconds (t). 



of water at 

 15°. 



correction. 



pressure (p). 



1000 



O 



14 



1846 



299-5 



151 



450-5 



831 



27-5 



1132 



2995 



151 



4505 



510 



41-3 



734 



2995 



149 



448-5 



329 



505 



657-5 



248-5 



149 



397-5 



261 



• 69-9 



425 



248 



1474 



395-4 



168 



80-2 



351 -5 



248-5 



146-5 



3950 



139 



90 



294 



248-5 



145-5 



394 



116 



100 



254 



248-5 



144-5 



393 



100 



Table V. 



■Viscosity of a solution containing 73*4 per cent. 

 H 2 S0i, 26-6 per cent. H 2 0. (E.) 







Pressure by 









Mean 



Time. 



gauge in mm. 



Siphon 



Total 



pt 



temp. 



Seconds (t). 



of water at 

 15°. 



correction. 



pressure (p). 



1000' 



o 



11-4 



1494 



330 



26 



356 



532 



23-4 



1016 



330 



26 



356 



362 



36-4 



717-5 



330-5 



26 



356-5 



256 



50-3 



521 



330-5 



26 



356-5 



186 



59 8 



431 



331 



25-5 



356-5 



154 



72-8 



339 



331 



25-5 



356-5 



121 



88-5 



262-3 



331-5 



25 



356-5 



94 



1005 



223 



331-5 



25 



356-5 



795 



