5 
The animals do not die until some days have elapsed after they 
have eaten the infected bread — in my experiments from 7 to 15 days 
were required. It is claimed by the discoverers that dying animals 
leave their burrows and runs and come into the open where they die 
or are easily caught, so that no offensive smells occur. On this point 
I cannot speak, as my experiments, owing to the need of having relia- 
ble “controls,” were on rats in captivity. 
The price of the Liverpool virus is 15/s per dozen tubes plus 4/s 
for the packing tin. A planter who wishes to try the virus would do 
best to order a dozen tubes, or two may combine to order a dozen. 
It might be better if the orders were sent through me. If the 
supplies could send a number of consignments together to one address 
they could make special arrangements to store the package in a cold 
room on the way out. This is important as it must be remembered the 
virus is alive and not a dead inert thing like the ordinary rat poisons, 
and therefore if it is protected against heat in tropical seas, a greater 
number of tubes are more likely to retain their virulence. 
. W. J. Gallagher. 
Government Mycologist , F. M. S, 
TWO MANICOBA RUBBERS. 
Manihot dichotoma , Ule, ‘ Jiquie Manicoba,’ and Manihot piau- 
hyensts, Vie, * Lorn an so or Piauhy Manitoba.’ 
Three lots of seeds of these two little known species of Manihot 
have just reached the Botanic Gardens Singapore. One lot was kindly 
sent by S. T. Dunn Esq., Superintendent, Forestry and Botanical 
Department, Hongkong, and the other by W. N. Smith Esq., Superin- 
tendent, Loyal Botanic Gardens, Calcutta. 
These seeds are, I believe, a part of a consignment recently receiv- 
ed from Brazil by the Director, Royal Botanic Gardens Kew. 
_ A large quantity of seeds from the same consignment has just been 
received by us from Kew through the Crown Agents for the Colonies. 
Mr. Dunn writes that they have such poor results from this tree 
in Hongkong (much too far north) that there is no desire to extend 
their experiments and he sends the seeds here as the best way of 
utilizing them. 
Mr. Smith sends a small packet of each species with the request 
that we will in due course let him know what progress the plants make 
in Singapore. 
The seed is slightly larger than that of Ceara but otherwise differs 
very slightly in appearance. 
According to an article on these two Manicobas appearing in the 
Kew Bulletin, 1908, page 59, it appears that the first intimation to 
reach Kew of the existance of rubber yielding plants closely related to 
the commonly cultivated Manihot Glaziovii took place in the early 
part of 1906 when Mr, J. A. Davy, Manager of the Dumont Coffee 
Company, Bibeirao Breto, Sao Paulo, Brazil, called at the Gardens and 
left some seeds of the Jequi6 Manicoba. It further appears that on his 
return to Brazil he sent more seeds with the following information ; — 
