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Thus, theoretically, is obtained the maximum of energy with the minimum of expenditure; in practice, however, the scavenging of the power cylinder, a matter of great importance in all internal combustion engines, is often imperfect, owing to the opening of the exhaust ports being of relatively short duration; clearing the exhaust gases out of the cylinder is not fully accomplished, and these gases mix with the fresh charge and detract from its efficiency.
The mixture which then entered the charging cylinder was transferred to the corresponding working cylinder when the piston of that cylinder had reached the end of its power stroke, and immediately before this the exhaust ports diametrically opposite the inlet ports were uncovered; scavenging was thus assisted in the usual way.
I had not made any contraptions for that purpose, having not thought about it in the hurry to leave my prison. I decided to use a traditional circling approach, in the same way scavenging birds descend on their prey. When I was a mile or so inland, I began to circle about in wide spirals, narrowing them as I drew closer to the ground.
But this engine has to be developed so as to overcome its inherent drawbacks; better scavenging methods have yet to be devised for this is the principal drawback before the two-stroke can come to its own as a prime mover for aircraft.
Are ye the fearless sea-hawks that have flown with me, and struck where the talons of my grappling-hooks were flung, or are ye but scavenging crows?" He was answered by an old rover whom fear had rendered greatly daring. "We are trapped here as Dragut was trapped at Jerba." "Thou liest," he answered. "Dragut was not trapped, for Dragut found a way out.
They live in holes higher up, but these are refuges for the day while they are scavenging in the sea. They were nearly under the feet of the horses. Near Sheher we passed the mouth of the Arfa river, where there is water, and near it are horribly smelling tanks where they make fish oil.
Having become by long experience a specialist in the business of moral scavenging, it proceeded to devote itself with most vehement energy to the business of moral reform. All indecencies that could not successfully cover themselves with such gilding as good hard gold can give were ruthlessly held up to public contempt. It continued to be cursed, but gradually came to be respected and feared.
The carburetted mixture was drawn into the scavenging cylinders, and the usual deflectors were cast on the piston heads to assist in the scavenging and to prevent the fresh gas from passing out of the exhaust ports.
The total cost of the street-cleaning in New York, in 1907, was $9,758,922, and in Manhattan, The Bronx, and Brooklyn 5,129 men were employed; while the working force in Berlin, in 1911, was 2,150. It should be said also that in New York an enormous amount of scavenging is paid for privately besides.
In the things that some one must do, the doer ranks in God's sight, and ought to rank among his fellow-men, according to how he does it. The higher the calling the more contemptible the man who therein pursues his own ends. The humblest calling, followed on the principles of the divine caller, is a true and divine calling, be it scavenging, handicraft, shop-keeping, or book-making.
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