- Software name: appdown
- Software type: Microsoft Framwork
- size: 737MB
"From your point of view there is nothing wrong," said Prout. "A mere coincidence, sir. If I could only, have a few minutes' private conversation with you, doctor?"Tangent wheels and spiral gearing have only what is termed line contact between the bearing surfaces, and as the action between these surfaces is a sliding one, such wheels are subject to rapid wear, and are incapable of sustaining much pressure, or transmitting a great amount of power, except the surfaces be hard and lubrication constant. In machinery the use of tangent wheels is mainly to secure a rapid change of speed, usually to diminish motion and increase force.
Bruce put his latchkey in the door and let himself in. As he did so a motor came up and pulled to the pavement. The whole concern was a dull black, like silk; it was absolutely the most noiseless machine Gordon Bruce had ever seen. It came like a ghost out of the darkness; like a black phantom it stood to command."And what happened after that?"
"I don't think you are," Ren said, with grudging admiration. "Do you know how I got here? We lured Balmayne into a trap under the idea that he was going to meet Ghetti, and I frightened your address out of him. He betrayed you."
"Stop it!" the Curate gasped. "My heart, you knowI have been warnedsudden shocks." He staggered to the wall and groped blindly for an emergency exit, which he knew to be there somewhere. He found it, forced the door open and fell limply upon the pavement outside.
"He opened one of the hatches just enough to allow one man to descend[Pg 399] at a time, and through this hole he compelled all the coolies who were then on deck to pass. Then he told the interpreters to say that they might burn the ship as soon as they liked, and the crew would leave in the boats. The boats were made ready for lowering; and, as we were not far from the coast, and the wind was fair, there was not much doubt of our getting safe to Hong-kong. Not a coolie would escape, and we should take good care that the fire would be so far advanced before we left that it could not be put out.I now come to speak directly of the present work and its objects. It may be claimed that a book can go no further in treating of mechanical manipulation than principles or rules will reach, and that books must of necessity be confined to what may be called generalities. This is in a sense true, and it is, indeed, a most difficult matter to treat of machine operations and shop processes; but the reason is that machine operations and shop processes have not been reduced to principles or treated in the same way as strains, proportions, the properties of material, and so on. I do not claim that manipulative processes can be so generalisedthis would be impossible; yet much can be done, and many things regarded as matters of special knowledge can be presented in a way to come within principles, and thus rendered capable of logical investigation.