LOSS OF NICOTINE FROM NICOTINE DUSTS 11 
The dusts prepared from 
free nicotine solution showed 
a greater loss in all cases than 
those prepared from nicotine 
sulphate. After 19 months, 
the maximum loss from the 
kieselguhr dust was 68 per 
cent and the mininum loss 
was 22 per cent of the quantity 
originally present. Thegreat- k 
est loss was from the plaster 
of Paris dust in canvas, which 
after 12 months reached 94 
er cent of the quantity added. 
The most striking feature of 
these samples is the high in- 
itial rate of loss, except in 
the case of the samples packed 
in the glass jars, from which 
the loss was small during the 
first two or three months. 
During the first two months, 
the maximum losses were 
more than 50 per cent for the 
calctum hydroxide dust, 45 per 
cent for the calcium carbonate 
dust, and 42 per cent for the 
plaster of Paris dust. 
cd 
12) 
Fig. 10.—Loss of nicotine from free nicotine-calcium hy- 
oxide dust 
ee 
50 ¥, = 
g, 
Fic. 9.—Loss of nicotine an free nicotine-plaster of Paris 
ust 
All the results obtained by 
using nicotine sulphate as the 
source of nicotine are sum- 
marized in Figure 11, which 
shows the effect of one vari- 
able only, the container, over 
a period of 20 months, for 
the six carriers and the three 
strengths. The loss from the 
glass jars is small. The 
other three containers show 
large losses and do not differ 
much. 
Similar data for the free 
nicotine preparations, cover- 
ing the four carriers used, are 
shown in Figure 12. As 
might be expected; the differ- 
ences between the several 
types of contaimers are great- 
er than was the case with 
nicotine sulphate. For the 
12 months during which all 
of the samples were under 
observation the paraffined box 
