NOTES AND ABSTRACTS. 
197 
6. Air-dried kelp will furnish a low-grade potash fertilizer comparable to 
kainit, and containing in addition over 1 per cent, of nitrogen and 50 per cent, 
of organic matter capable of furnishing humus to the soil. 
7. Objections to the use of dried kelp because of the presence of sodium 
and chlorine are untenable, because this material contains less sodium and 
chlorine than most of the commercial potash salts now being used, and is but 
little inferior in this respect to the highest grades of muriate. — A . A. K. 
Lead Arsenates, The. By H. B. Robinson and H. V. Tartar (U.S.A. Exp. 
Stn., Oregon, Bull: 128, May 1915). — The authors have prepared a reliable method 
for the preparation of lead hydrogen arsenate (PbHAs0 4 ). 
It is claimed that this material does not settle at anything like the rate of 
the basic arsenates ; in the test a certain portion of the former was in suspension 
after one hour, while the latter had practically all settled in two minutes. This 
is a great advantage in field spray work. 
Lead hydrogen arsenate will also kill quicker than basic arsenate. It will 
not, however, safely mix with lime-sulphur, too much soluble calcium arsenate, 
as well as lead sulphite, being formed. On the other hand, the reaction between 
basic lead arsenate and lime-sulphur is comparatively slight. — C. P. C. 
Lilies, Some Hardy. By Sir Herbert Maxwell (Garden, Jan. 2, 1915, p. 3; 
ib. Jan. 9, p. 15 ; ib. Jan. 16, p. 27 ; ib. Jan. 23, p. 39 ; ib. Jan. 30, p. 51 ; ib. Feb. 6, 
p. 63; ib. Feb. 13, p. 76). — Difficulties in cultivating lilies arise mainly from two 
sources : (1) The species exist in a natural state under widely different con- 
ditions ; (2) the majority of bulbs offered for sale have been imported from 
distant lands, and arrive in such a condition of impaired vitality as to render 
them vulnerable to disease. Imported bulbs should be treated as invalids and 
kept in hospital for six months to a year after arrival, and not planted in the 
open at once. They should be dipped in a 1 per cent, solution of salicylic acid, 
dusted with sulphur, and potted in 6- or 8-inch pots. Base-rooting lilies so 
treated which send up a strong shoot in May if the pots are full of roots may be 
then planted out. With stem-rooting lilies the appearance of a strong shoot 
is no proof that the plant can take a permanent place in the garden ; the pots 
should be plunged outside and the flower-buds removed as they form. 
The author proceeds to treat in detail of the following, giving the special 
treatment required in each case : — L. Browni and its var. colchesterense, L. candi- 
dum, L. japonicum (Krameri), L. longifiorum, L. regale, L. rubellum, L. Sargentiae, 
L. auratum, L. Henryi, L. speciosum, L. tigrinum, L. bulbiferum, L. concolor, 
L. croceum, L. davaricum, L. elegans, L. philadelphicum, L. canadense, L. chalce- 
donicum, L. Colchicum, L. Humbolti, L. Kelloggi, L. x Marhan, L. Martagon, 
L. pardalinum, L. Parryi, L. pyrenaicum, L. pomponium, L. superbum, L. tenui- 
folium, L. testaceum, L. giganteum. Perhaps these may be considered the 
author's list of hardy lilies. — H. R. D. 
Lilium testaceum, Early History of. By H. P. (Garden, Feb. 27, 1915, 
p. 100). — A complete account of this lily is found in the " Monographic Historique 
et Litteraire des Lis," by Fr. de Cannart d'Hamale, Malines, 1870. It was first 
found by F. Ad. Haage, jun., of Erfurt, accidentally, in a consignment of Martagon 
bulbs from Holland. In 1840 or 1841 it was introduced into Belgium by L. van 
Houtte, of Ghent, who received a case from M. von Weissenborn, of Erfurt, in 
exchange for four fuchsias. Thence it came to England, where it was figured 
by Lindley as L. testaceum in the Bot. Reg. in 1843. It was also described by 
Dr. Kimtze, of Halle, as L.isabellinum, and has been known under the name 
L. excelsum. The question was raised whether it may not be the product of 
L. candidum with one of the Pomponium section. — H. R. D. 
Lime-sulphur Spray, A Report of Chemical Investigations on the. By 
H. V. Tartar (U.S.A. Exp. Stn., Oregon, Res. Bull. 3, March 1914). — The author 
gives various analytical methods of determining the composition of the spray ; 
he incidentally shows that it is the calcium polysulphides which are the active 
agents in the lime-sulphur solution, and advances the opinion that this is largely 
due to their great power of absorbing oxygen. 
The detrimental effect of magnesia in the lime is also clearly demonstrated. 
C. P. C. 
Lime Washes, Notes on. By J. C. F. Fryer and G. P. Berry (Jour. Bd. Agr. 
xxii. No. 11, Feb. 1916). — These notes were prepared by the Entomologist and 
Horticulturist to the Board of Agriculture, and deal with certain aspects of the 
insecticidal action of lime washes. In their simplest form they are essentially 
