[10] Humus is vegetable mold; swamp muck; peat; etc.—Editor.
[11] A leak in a gas main, allowing the gas to penetrate the soil, will destroy trees, shrubbery, or any other vegetation with which it comes in contact.—Editor.
[12] Town and village paving plans will benefit by knowledge of the recent satisfactory experience of New York City authorities in paving with wood blocks soaked in a preparation of creosote and resin. As compared with the other two general classes of paving, granite blocks, and asphalt, these wood blocks are now considered superior.
The granite blocks are now nearly discarded in New York because of their permeability, expense, and noise, being now used for heavy traffic only.
Asphalt is noiseless and impermeable (thereby serving the "double sanitary purpose" mentioned by Dr. Price).
But the wood possesses these qualities, and has in addition the advantage of inexpensiveness, since it is more durable, not cracking at winter cold and melting under summer heat like the asphalt; and there is but slight cost for repairs, which are easily made by taking out the separate blocks.
These "creo-resinate" wood blocks, recently used on lower Broadway, Park Place, and the congested side streets, are giving admirable results.—Editor.
CHAPTER II
Ventilation