196 



DR. R. ANGUS SMITH 



Table IV. — To be used when the point of observation is 

 " no precipitate" Half an ounce of lime-water, con- 

 taining 0'0i95 gramme lime. 



Air at o° Q,., and 760 millims bar. 



Carbonic acid 



Volume of 



Size of 



Size of bottle, 



in the air, 



air, in 



bottle, in 



in ounces 



per cent. 



cub. centims. 



cub. centims. 



avoirdupois. 



0-03 



571 



584 



20-63 



0-04 



428 



443 



15-60 



0-05 



342 



356 



12-58 



o-o6 



285 



299 



10-57 



0-07 



24s 



259 



9-13 



o-o8 



214 



228 



8-05 



0-09 



190 



204 



7-21 



o-io 



171 



i8s 



6-54 



o-ii 



156 



170 



6-00 



0'12 



143 



157 



5-53 



0-13 



132 



146 



5'i5 



0-14 



123 



137 



4-82 



0-15 



114 



128 



4-53 



0-20 



86 



100 



3'5^ 



0-25 



69 



83 



2-92 



0-30 



57 



71 



2-51 



0*40 



43 



57 



2-OI 



0-50 



34 



48 



1-71 



o-6o 



29 



43 



1-51 



070 



25 



39 



1-36 



o-8o 



22 



36 



1-25 



0-90 



19 



33 



1-17. 



i-oo 



17 



31 



i-io 



It is worth observing that the proportion of lime and 

 baryta are nearly as their atomic weights. Perhaps more 

 minute observation would make it quite the same. It was 

 supposed that lead might give a similar proportion j but the 

 texture of the precipitate was entirely different, the par- 

 ticles much larger. This prevented it being used in a 

 similar way, and obstructed the theory as well as the 

 practice so far. 



One of the main advantages of this process is that it 

 requires no weighing and no measuring, and we may 

 almost say no thinking; this idea is, perhaps, more fully 



