170 
signs of wilting, and on examination the cortex of the root was 
found to be destroyed in places by the worms which were present in 
considerable numbers. After examination the plant was re-potted 
and the soil treated with carbon bisulphide, as Theobald has stated 
that the worms are killed by this substance. One dram of carbon 
bisulphide was poured on to the “crocks” through the drainage 
hole at the bottom of the pot. Three days after this treatment the 
lower leaves of the Begonia commenced to wilt and bleach, and at the 
expiration of a week all the fully grown leaves were quite colourless 
and collapsed. At this stage the plant was removed and all the 
worms were found to be dead. 
The use of carbon bisulphide having been proposed as a cure 
for eelworm, &c., attacking pot plants, the disastrous result of this 
substance on the Begonia suggested further experiments. In order 
Pelargonium, well-established in pots of the size known to gardeners 
f ; i 
were not, however, killed outright. Afterwards two plants, a 
Begonia and a Ulex, were each treated with three drops of carbon 
bisulphide, and in this instance neither plant showed any sign of 
injury. In every experiment the carbon bisulphide was introduced 
into the soil through the drainage hole at the bottom of the pot by 
pouring it on the “ crocks,” so that it did not come in contact with 
the root of the plant in liquid form. It is usually stated that this 
substance is not at all injurious to plant life if the root does not 
come in contact with the liquid, and this statement would appear to 
be true if the substance is used with care and in small quantity. 
The above experiments suggest that it would not be wise to 
attempt the treatment of pot plants in vigorous growth with 
carbon bisulphide with the object of eradicating eelworm, &c. 
Fridericia bisetosa is snow-white, as slender as thread, equal in 
thickness throughout, and about three-quarters of an inch in length. 
It occurs in old horse-dung, among rotten leaves, &c., and probably 
from such sources finds its way into the soil used by gardeners. 
_ The treatment of such leaf-soil, &c., with carbon bisulphide some 
time before it is used would be a wise precaution. The same 
remark applies to the soil introduced into tomato-houses, &c. 
In dealing with carbon bisulphide it is very important to 
remember that it is highly inflammable, the heat from a lighted 
cigarette being sufficient to cause an explosion. 
Gr 
Presentations to Museums.—The following miscellaneous speci- 
mens have been received in addition to those previously recorded in 
the Bulletin :— 
Messrs. John Yates & Co., Aston Manor, Birmingham.—Set of 
axes and other tools for the Forestry Museum. 
