No person shall deposit on any public sidewalk any material which may be harmful to the pavement thereof, or any waste material, glass or other article which might cause injury to persons, animals or property.
Merchandise or other articles may be deposited on sidewalks preparatory to delivery, provided that the useable width of the walk is not thereby reduced to less than four feet, and provided, further, that no such article shall remain on such walk for more than one-half hour.
(1942 Code Chap. XL, Art. I, Sec. 15)