306 
PARK AND CEMETERY. 
THE SELECTION OF DUST PRE V ENTATI VES 
Abstract of a section of “Dust Prevention,” Bulletin 
No. 27 of the Ohio State Highway Department. 
There are many factors to be taken 
into consideration in selecting a proper 
dust preventive, chief among them being 
the type of road under consideration, the 
condition of its surface, the character of 
the traffic and the standard of living of 
the community, as well as the amount 
of money available. Although the method 
employed under one set of conditions 
might be entirely unsuitable for another, 
in a general way, it is possible to obtain 
satisfactory results by the careful se- 
lection of materials. 
Pavements. — Inquiries have been re- 
ceived by the State Highway Depart- 
ment as to the method of laying the dust 
on a brick street, and the advice has 
been to ‘‘clean it.’’ Attempts have been 
made to apply oil and various prepara- 
tions for retaining the dust on such pave- 
ments, but such methods are to be con- 
demned. The only satisfactory way to 
keep brick, asphalt, wood block and con- 
crete pavements clean and dustless is to 
sprinkle and sweep them, or, in some 
cases, flush them with water under pres- 
sure. There will ordinarily be no dust 
nuisance on such pavements built in ru- 
ral districts with sunken curbs, as the 
rain water will keep them clean. 
Suburban Roads.— The suburban stone 
road offers the widest choice of methods 
of dust suppression, the choice depend- 
ing largely upon the degree of perma- 
nency desired. For the most lasting re- 
sults, either the heavier tars or asphaltic 
oils may be used, while for less lasting 
results the choice lies between the 
lighter oils or tars, the emulsions, cal- 
cium chloride and various patented prep- 
arations. If there are hydrants at con- 
venient intervals along the road, salt so- 
lutions or emulsions may be used. If an 
emulsion is to be used, that product con- 
taining the greatest amount of binding 
base per unit cost should be selected, un- 
less it possesses some other quality such 
as a strong, disagreeable odor which 
makes it undesirable. While, as stated, 
the selection of the material must be 
governed by local conditions, it is be- 
lieved that in most cases the more per- 
manent methods of dust suppression will 
be the more desirable. 
Park Roads and Race Courses. — These 
are considered together, not necessarily 
because of a similarity in type, but be- 
cause the temporary binders are espe- 
cially suited to both types. On such 
roads the traffic conditions are consider- 
ably different than on other types. In the 
case of a speedway, the use in general is 
limited to a very short time, while traffic 
on park roads is chiefly confined to the 
summer months. It is, therefore, ob- 
vious that in many cases the best econ- 
omy would not be obtained by the use 
of the more permanent dust preventives. 
A treatment of calcium chloride has 
proven very satisfactory for race courses, 
and for park and similar roads, subject- 
ed to traffic for a longer time, oil and 
tar emulsions have been used advan- 
tageously. 
Rural Roads. — The number of meth- 
ods of dust prevention to select from 
for roads of this class is much more 
limited than in the case of suburban 
roads. It is apparent that the temporary 
treatments are not applicable to most 
country roads for the reason that a con- 
venient water supply, required for the 
use of the oil emulsions and salt solu- 
tions, is not available. Rural roads may 
be classified as hard roads and soft roads, 
hard roads including brick, concrete and 
macadam and soft roads including gravel 
and earth, the gravel sometimes being 
worthy of a place in the first classifica- 
tion. The material to be selected will 
depend upon the kind of road to be 
treated Brick and concrete roads will 
be maintained in a comparatively dust- 
less condition by rain water and need not 
be considered further. The most satis- 
factory method of treating macadam is 
by a surface treatment of hot asphaltic 
oil or refined tar covered with gravel, 
slag or stone chips. Other things being 
equal, this method is recommended in 
preference to cold treatments with 
lighter oils and tars, for although these 
are applied at a much less cost, the re- 
sults are not so lasting. If, however, 
the road cannot be cleaned so as to ex- 
pose the large stones in the surface, the 
lighter oils and tars are likely to give 
the better results. Provided both are of 
suitable grade and of good quality, there 
is not much preference between oil and 
tar for this class of work. A good tar 
is preferable to a greasy paraffin oil, and 
a good asphaltic oil is far better than a 
poorly prepared or high temperature tar. 
Gravel roads have been treated with both 
oil and tar, but more generally with the 
former. In the case of a good, hard 
gravel road, practically the same treat- 
ments as recommended for macadam may 
be applied. The cold surface treatment 
has been used to a greater extent than 
the hot treatment for this type of road, 
and Gultrin has also been used to some 
extent. 
It may be said in conclusion that it is 
essential to give careful consideration to 
all local conditions governing the selec- 
tion of proper material and the proper 
method of application. Care must also 
be taken to secure good quality in the 
material which is selected, which means 
that the material should be examined 
and tested. It is also important that the 
treatment should be renewed as soon as 
the condition of the road demands it, if 
it is desired to maintain the road in 
good condition and free from dust. 
ASKED AND ANSWERED 
An exchange of experience on practical matters by our readers. You 
are invited to contribute ijuestions and answers to this department 
Cleaning Mausoleum Interiors. 
Editor Asked and Answered: What 
provision should be made for cleaning 
of mausoleum interiors, such as scrub- 
bing, etc.? — H. B., O. 
It would seem to me that there would 
be a very great variation in the care of 
the interior of these vaults. The smaller, 
simple vaults might be satisfactorily 
cleaned, I think, on the income of $300. 
Then for the more elaborate interiors, 
where there would be considerable 
bronze, mouldings, corners, etc., I think 
possibly the income on $2,500. These 
prices would not include repairing. 
We have found Wyandotte detergent 
to be the most satisfactory compound 
that we have used for cleaning. 
R. Trigg, 
Supt., Cedar Bluff Cemetery. 
Rockford, 111. 
In this cemetery there are very few 
mausoleums, but from 1860 to 1870 a 
large number of side hill tombs with 
vestibules were built. Nearly all of these 
are provided with perforated marble or 
bronze doors, so that frequent attend- 
ance is needed. 
The superintendent of interments is 
provided with a book in which are listed 
the tombs for which the corporation is 
responsible. About once a week the 
workmen wash the floors, dust, etc., as 
may be needed, and return to the office 
a time card with the usual data. 
Tt was considered desirable that men 
of more than average appearance should 
attend funerals, so a special department 
was created with sufficient force to give 
proper attendance and flexible enough to 
meet emergencies. The problem of find- 
ing work for these men in the intervals 
was solved by turning over to them the 
washing and care of tombs and monu- 
ments. By keeping an exact account of 
the time spent, a fair idea can soon be 
had of the proper charge to be made for 
the work. J. C. Scorgie, 
Supt., Mt. Auburn Cemetery. 
Cambridge, Mass. 
