182 Dr. A. Voelcker on the Chemical Composition of the | 
The residue left on evaporation of this fluid was slightly co- 
loured, and gave an almost colourless solution with water. A 
portion of this solution was kept im a closed bottle. After the 
lapse of a fortnight the water in the bottle became turbid and 
depesited some hight white flakes. The acid reaction, which was 
very distinct before, had now disappeared entirely. 
4. Fluid from opened pitcher-plants grown in the Experi- 
mental Gardens, June 14th, 1849. 
The fluid in the open pitchers was coloured yellow, but other- 
wise perfectly clear. The reactions with chemical tests were the 
same as the preceding. 
97°74 grains of water left on evaporation 0°85 of a grain of 
dry residue. 
100 parts therefore contained 0°87 per cent. of solid matter. 
This residue was coloured yellow, but redissolved entirely im a 
little water. 
5. Fluid from unopened pitcher-plants grown in Messrs. 
Dickson’s nursery, June 17th, 1849. 
Fluid perfectly clear and colourless, reactions the same as above. 
319-48 grains left a residue which, dried at 212° F., was found 
to weigh 1°88 grain ; or 
100 parts of the liquid contained 0°58 per cent. 
6. Liquid from unopened pitcher-plants grown in Messrs. Dick- 
son’s nursery, June 21st, 1849. 
Physical and chemical characters of the hquid the same as 
above. 
193°82 grains of water left on evaporation 1:22 grain of dry 
residue, or 0°62 per cent. 
When burnt the 1°22 grain lost in weight 0°44 of a grain, 
or 100 parts of the residue lost 36-06 per cent. 
The solid matter of this liquid was very hygroscopic, and co- 
loured more yellow than that of the Botanical and Experimental 
Gardens. I found that the total weight of the solid matter in this 
fluid was not so large as in that of the Experimental Gardens, but 
that the proportion of organic matter in the residue was larger 
than that in the residue of the fluid procured from the Experi- 
mental Gardens. 
7. Water from opened pitcher-plants grown in Messrs. Dick- 
son’s nursery, June 24th, 1849. 
This fluid was yellow-coloured and not quite clear. Litmus 
paper was turned red when moistened with the water. The re- 
actions were the same as above, with the exception that nitrate of 
barytes produced a slight turbidity, indicating the presence of 
sulphuric acid. As I found no sulphuric acid in the liquid from 
the unopened pitchers of the same plants, nor in any of the 
liquids I examined, I think the sulphuric acid which I found 
