asymmetric quinguevalent nitrogen compounds . 179 
monium d-a-bromocamphor-7-sulphonate (melting at 155—-159° C. 
with decomposition) in water at 14°C., gave [a]p =81'5°. After 
two months in a thermostat at 20°C., the same solution gave 
[a]p =79°9°. On boiling the solution, however, it became cloudy, 
oily globules making their appearance. The pure compound can 
be recrystallised from dry ethyl acetate without any racemisa- 
tion occurring. On recrystallisation from alcohol a slight fall in 
the rotatory power is observed, while on crystallisation from 
chloroform solution the fall is more marked. Further study of 
the properties of these compounds is in progress. 
The above investigation was undertaken on the suggestion of 
Professor Pope, to whom the thanks of the author are due both 
for the suggestion and for his continued interest during the work. 
