Show FIRES CAUSED aused C BY s mm INa OF oll ROCKS by A M woodbury park naturalist lot A new method of starting start lae fc 0 re t fires was discovered recently by b y hj n r T evans ot of the 11 S geological sur suri i vey was near oak balc creek a small slide of rock camo came rolling down the slope across a amell can canyon opposite hlin him As ho he stood watching vat yon c aing the rolling and dust clear clear away a small tree probably utah juniper burst burat into flames near the foot of the slide and started a small forest fire in the brush and scrub timber just bust how the tree trea became ignited la Is a matter of bon conjecture jecture the slide elide occurred on a south exposure near mid afternoon when tho the sun suit was pouring its burning rays down among the scanty vegetation most host everything was hot and dry ready to burst into flames at the slightest provocation the bark ot of the juniper Is soft and and makes an excellent tinder the spark may have been generated according to mr evans evana in either one of 0 two ways dy by rocks striking together or by friction of a rock rubbing past the combustible bark in either case it would be but a few moments until the bark would be ablaze |