. Eleven miscellaneous papers on animal parasites. Parasites. 16 BUREAU OF ANIMAL INDUSTEY. commission and later by the employees of the State board of agriculture. The egga were scraped off or cut away from the objects upon which they rested, placed in tin cans, and burned in stoves or brush fires. A fierce heat is required to insure their destruction. When exposed to such heat they finally burst with a snapping like a bunch of miniature firecrackers or the cracking of corn in a popper. Whenever the eggs were very numerous in undergrowth or waste land, fire was run through the dead leaves and
. Eleven miscellaneous papers on animal parasites. Parasites. 16 BUREAU OF ANIMAL INDUSTEY. commission and later by the employees of the State board of agriculture. The egga were scraped off or cut away from the objects upon which they rested, placed in tin cans, and burned in stoves or brush fires. A fierce heat is required to insure their destruction. When exposed to such heat they finally burst with a snapping like a bunch of miniature firecrackers or the cracking of corn in a popper. Whenever the eggs were very numerous in undergrowth or waste land, fire was run through the dead leaves and debris as an experiment; but this method seemed to have little effect, as the heat was not sutficiently intense. The hairy covering of the egg clusters seems to possess remarkable nonconductive properties, rendering the eggs almost impervious for a time to sudden intense heat. Even with the hottest fire that can be applied to the egg clusters, some minutes are required to destroy them utterly. A running brush fire merely scorched the outside of the cluster, killing perhaps a few of the eggs in the external layer, but leaving the majority uninjured. Experiments were next made with crude petroleum, by spraying it over the ground and vegetation by means of watering pots and then igniting it. The fire thus made was fierce enough to destroy the small undergrowth and the upper layer of leaves, together with most of the eggs, l)ut such egg clusters as remained under roots or rocks were not injured. Considerable oil was wasted by soaking into the ground, and the remainder did not give the degree of heat which is obtained by atomizing. Experiments were then made with a view of perfecting a burning machine which would incinerate all undergrowth in a given tract. The first experiments were not entirely successful, as the machines were either too cumbersome or could not be used on rough or uneven ground. It was found necessary to provide an apparatus which would distribute the oil in a sp
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashi, bookyear1902
