2 go 
point of attachment of the nodule to the root, c.g. Albizzia moliic- 
cana and Entada scandens. Nodules of the former class are more 
easily confused with eel-worms than those of the latter group. 
Both kinds occur on the roots of Acacia d currens. 
With a view of obtaining some definite knowledge of the abun- 
dance or otherwise of the nitrogenous nodules on plants which are 
common iiv Ceylon the following classification has been com- 
menced : — 
Plants possessing Nitrogenous nodules. 
Climbers-. — -Entada scandens (Woody climber) ; Phaseolus vulgaris ; 
Mueuna pruriens- Canavalia ensiformis; Abrus precatorius; 
Dolichos falcatus. 
Herbaceous plants'. — Annual or Perennial; Crotalaria striata ; ('. 
ineana; C. verrucosa; C. semperflorens ; C. iaburnifolia. Mi- 
mosa pudiea (introduced) ; Pseudarthria viscida; Vicia sativa : 
Desmodiiun triilorum ; I), jucundum; D. heterophyllum. 
Cassia tora ; C. mimisoides; C. hirsuta; C. absus; Alyssi- 
carpus vaginalis; A. bupleurifolius; Indigofera trita; I. pau- 
cifolia ; Tephrosia purpurea. 
Frees \ — Albizzia moluccana; A. stipulata; A. odoratissvma,; Pithe- 
( olobium saman ; P. dulce ; Acacia decurrens; A. arabica; 
Leucaena glauea ; Erythrina li< bosperma ; E. ovalifolia ; E. 
indica; E. umbrosa; Cassia grandis; Bauhinia tr andra; Colvil- 
lia racemosa; Sesbania grandiflora; Ormosia dasycarpa; Dal - 
bergia armata ; Pterocarpus indicus ; P. eehinatus: Amher- 
stia nobilis; Hard wick ia pinnata ; Lonchocarpus latifolius; 
Psopliocarpus let ragonobolus ; Pongam i a glabra ; Brva cbe- 
nus ; Dimorphandra mora ; Trachvlubium verrut osum ; Co- 
paifera officinalis. 
It will be noticed that no statement is made as to the percentage 
of nitrogen in the nodules. The work up to the present has con- 
sisted of collecting our .best native and introduced species and 
determining the weight of the nodules per plant. A series of 
experiments in beds and tins has also been arranged to determine 
the increase in percentage of nitrogen in soil which has been occu- 
pied for a definite period with a particular species. The selected 
plants include our common species of Albizzia , Crotalaria and 
Erythrina , and several imported species. 
Agricultural Journal of the Royal Botanic Gardens, 
Ceylon , April , 1903. 
BLUMEA BALSAMIFERA. 
In the Bulletin Economique de PIndo Chine No. 18 for June, 
1903, is an analysis of the Camphor obtained from this plant by the 
natives of Laos and Tonkin. The sample came from the province 
