562 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
Someideaof the value of this work may be obtained from the heading of one 
of the tables, comprising such items as Latitude, Longitude, Kind, Density of 
Bed, Size, Area, Tonnage, Nearest Shipping Points, Anchorage and Shelter. 
One of the sections in Western Alaska is estimated to produce 80,300 tons of 
potassium chloride* — C. P. C. 
Kerria japonica, A Twig and Leaf Disease of. By V. B. Stewart {Phyto- 
pathology, vii. pp. 399-407, Dec. 191 7 ; figs.). — Small discolored areas of a 
reddish-brown colour are produced on leaves which later become yellow, shrivel, 
and fall prematurely. Similar spots occur on the shoots, and frequently the bark 
dries up on these spots and falls away, sometimes to such an extent that the twig 
is girdled. The fungus involved appears to be a new species which is described 
as Coccomyces Kerriae. — F. J. C, 
Lagenaria oleifera. By R. de Noter (Le Jard. vol. xxxi. pp. 190, 191 ; 1 
fig.). — It is proposed to cultivate this gourd as a source of oil. With plenty of 
manure and water it would succeed in the south of France or Algeria. Each 
gourd weighs about 50 lb. and is full of seeds, from which the oil is expressed ; 
12 lb. of oil are obtained from each gourd. The residue forms a valuable food 
for cattle.— 5. E. W s 
Lemon-grass Oil, Possibility of Commercial Production of, in the United 
States. By S. C. Hood {U.S.A. Dep. Agr., Bur. PL hid., Bull. 442, Jan. 25, 
1 91 7, 12 pp. ; 3 figs., 6 tables). — A volatile oil distilled from Cymbopogon citraius 
DC, commonly called lemon-grass, used in the perfume and soap industries. 
The climatic requirements are subtropical ; it is chiefly produced in India and 
Ceylon. Experiments have been made in Central Florida, and it is believed 
that the crop would yield favourably if grown in connexion with other volatile- 
oil plants. With lemon-grass alone, the distilling plant would be in use during only 
a few weeks in the year. The bulletin gives details of culture, distillation, &c. 
F. G. A. 
Lilies In July. By J. W. B. (Irish Gard. xii., Aug. 1917, p. 126). — Interesting 
notes on Lilies blooming in the month of July. — E. T. E. 
Lilium Parkmanni. By P. S. Hayward (Gard. Sept. 1, 1917, p. 359; fig.). — 
Well-nigh half a century ago Mr. Parkman, an American, raised L. Parkmanni, 
a grand hybrid between L. auratum and L. speciosum, and it is a pity such a noble 
plant should be lost. 
This season the author flowered the new hybrid, which is a successor to 
L. Parkmanni between L. speciosum and L. auratum. It carries the size of 
L. auratum platyphyllum and its fragrance with the finest L. speciosum colouring. 
The seed was sown in 191 4, and from present appearances it gives the impression 
of a first-class constitution. 
The editor appends a note of the history of L. Parkmanni. — H. R. D. 
Lilium pseudo-tigrinum. Anon. (Irish Gard. xii., Oct. 19x7, p. 150). — A 
very desirable new Chinese species. — E. T. E. 
Lime as an Insecticide. By Z. P. Metcalf (Jour. Econ. Entom. x., pp. 74-78 ; 
Feb. 1917). — -This paper gives an account of experiments carried out for the 
purpose of finding a control for the pea and bean weevils (Bruchus chinensis Linn, 
and B. quadrimaculatus Fabr.). Carbon-bisulphide in large doses, paraffin, 
and crude carbolic acid did not give at all satisfactory results ; but the use of 
air-slaked lime was successful. 
The article is accompanied by plates inustrating cow-peas untreated and 
treated with various quantities of lime. Farmers are advised to store their 
seed peas in air-slaked lime at the rate of one part lime to two parts peas by 
weight, until something cheaper can be found. It is not necessary thoroughly to 
incorporate the lime with the seed in order to secure protection. In these 
experiments it was simply poured over the seed previous to bagging (see Abstract 
on Insect Metabolism) . — G s W. G, 
Lime Sulphur Solution. By A. A. Ramsay (Agr. Gaz. N.S.W. vol. xxix. 
pp. 210-211). — There is an essential difference between lime sulphur and self- 
boiled lime sulphur solutions. Only a small proportion of lime and sulphur 
enter into chemical combination in the self -boiled solution, and the chief product 
of the reaction is calcium thiosulphate, which has small fungicidal value. The 
sulphur in suspension is probably the active ingredient. In the lime sulphur 
solution, 91 per cent, of the lime and sulphur go into solution. Most of the 
sulphur is present as polysulphide. — 5. E. W, 
