PARK AND CEMETERY, 
187 
shape. To prevent them from grinding and becom- 
ing dusty an inch of hardpan is spread over the 
whole surface, and then a thorough sprinkling is 
resorted to. When partially dried out a half inch 
of pea gravel is rolled in with a heavy roller. 
Jackson Dawson, Arnold Arboretum, says; 
Long before the present park system was inaugur- 
ated there was in many factory villages in New 
England, roads and sidewalks made of coal cinders 
and ashes. The reason at the time was scarcity of 
good road material, and also a desire to get rid of 
accumulated cinders from their boilers, which could 
not be utilized for any other purpose. Many of 
the roads today are clean and dry. These cinder 
roads when once well settled do not heave or be- 
come dusty as do gravel walks. Although at first 
they are hard to walk upon, they soon become 
settled and each rainstorm helps to make them 
clean and bright, and when once well washed and 
hardened no walk is more cleanly and elastic to the 
foot. The beginning of a good cinder walk is to 
have it well drained either by broken stones or 
coarse slag at the bottom, filling-up with the finest 
material on top. If this walk is watered and rolled 
no better or more elastic walk can be had; it is also 
one of the cleanest and easiest cared for walks that 
I know of.” 
John C. Olmsted says: “Where extreme econ- 
omy is necessary and especially as a temporary 
expedient I approve of the use of screened cinders 
for walks, but would certainly advise covering 
them with binding gravel, partly because of the 
greater durability of the latter but chiefly because 
of its much more natural and agreeable appear- 
ance. 
H. S. Adams says the city of Cambridge, Mass., 
in former years built its sidewalks in the lower 
portion of the city almost wholly of house ashes. 
In the warm days of spring, however, the walks 
would “track” disagreeably. 
C. F. Lawton, New Bedford, Mass., finds cin- 
ders when covered with stone screenings to make 
the best cheap walks obtainable. All the cinders 
from two of the largest mills in the city are taken 
and used entirely for sidewalks. After being care- 
fully leveled, they are often rolled with a one-horse 
roller, and then an inch layer of screenings is laid 
on top. When they are trodden in the walk is 
hard and smooth, sheds water rapidly, and does 
not get muddy. 
Charles S. Anthony, Taunton, Mass., uses 
gravel or cinders with a covering of fine or screened 
gravel or crushed stone dust. Crushed stone dust 
makes a most excellent covering, of a good color 
and easily kept smooth and hard. 
GARDEN PLANTS— THEIR GEOGRAPHY, LVIII. 
LAMIA LES. 
THE VERBENA, MONARDA AND AjUGA ALLIANCE. 
( Continued 
Audibevtia is a genus of perennial or sub- 
shrubby North-west American plants some of 
which arc commonly called “grease-woeds.” A 
S. AZrRE.\ S.M.VIA Rl'TlLA.XS*. 
GRANDIFLOR.K. S. FARIXACKA. 
grandiflora grows to three feet or so high and has 
large crimson purple flowers in interrupted bractc- 
ate spikes. Several are good bee plants, and in 
fact the tribes are full of honey yielding plants. 
Nepeta is the “ground ivy” with 130 species in 
the northern hemisphere. N. glechoma variegata 
.SAI.VIA SPr.ENDRXS* AND VAR. I-OI.IIS .AUREIS. 
♦Described in last issue. 
