51 
azurea and E. speciosa raa a mass of flower. Here it has been found 
desirable to raise Nymphea zanzibarensts and N. dentata annually from 
seeds, instead of trying i" winter the tubers ; seeds are sown in August 
of each year and are kept going in small tanks under glas. In a small 
with such limited accommodat At the entrance to the lily ponds a 
group of Oleanders, plonged^ in the turf, produced a fine effect; these 
plants are stored duri ing winter in a dark shed just kept clear of frost. 
Lincoln Park.— his noble park, upwards of 34G acres in extent, 
has been created from a succession of sand dunes, with a swale or two 
intervening. The low ground did not produce black soil enough to give 
a covering to the surface of the park of more than an inch in ‘thickness, 
so in order to supply food for the trees and turf, dressings of manure and 
soil must be constantly given. 
The lily ponds here are more extensive than those of Washington 
Park. In 1889 advantage was taken of a depression between two sand 
dunes, and two ponds were made of irregular outline, with walls and 
bottom of cement concrete. One of these was heated so as to permit the 
cultivation of Victoria regia and tropical water-lilies. This attempt 
was so successful that the following year a third pond was formed in a 
ravine still further north. The tender water-lilies are planted in large 
flowers of Nymphea zanzibarensis measured 13 inches across, those of 
.N. dentata, N. Sturtevanti, and N. devoniensis were also proportionately 
large ; a plant t of the last named was 18 feet across, and ena 
number of its large red flowers. The Nelumbiums are not ge in 
winter like the tender lilies, but are permanently planted out in the 
unheated ponds ; now and then, during winter, musk-rats find their way 
under the ice and play havoe with the rhizomes ^ Limnocharis, 
Aichornia, and many genera which have to be grown under aede in 
England make a brave show under the hotter sun of Illinois. Colocas 
fine rti and other beautiful foliage and flowering plants sión 
the ban 
Areal interesting. and popular feature is a noble herbaceous collec- 
tion. This is arranged on each side of a glassy glade about 900 feet 
long, the borders following the sinuosities of the backing of trees and 
obsides canipanulas, and other native and exotic perennials, were thriving 
admirably. 
re irse group of houses, fourteen in number, were interesting 
rin ries from many pus of view. They are probabiy the sig x 
of plant houses in America. ens use of perishable materials in their 
MR cett - been avoided as much as possible. 
of steel and glass, even to dé glazing bars, which are of steel 
( Helliweel petat) The glass is rough-ribbed plate, quarter inch in 
thickness. In the palm house all the specimens were planted out and 
were growing vigorously; palms, cycads, ferns, ficus, &c., were in the 
rudest health ; the dorik was selaginella, &e. The entire group 
of houses is fitted with an apparatus which automatically regulates the 
heating aud ventilation; the steam valves are worked by compressed air, 
and there is a thermostat in each house. The boilers are above 350 feet 
