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ONE:It was not the usual voice of Gilbert Lawrence that spoke. There was a dogged grimness about him that would have surprised his friends. "Let us light the gas and smoke here for a time," he said. "There is not the slightest chance of those people coming back, and there are no windows overlooking this one. I have a good deal to say to you."(1.) What analogy may be found between steam and water power?��(2.) What is the derivation of the name turbine?��(3.) To what class of water-wheels is this name applicable?��(4.) How may water-wheels be classified?��(5.) Upon what principle does a reaction water-wheel operate?��(6.) Can ponderable weight and pressure be independently considered in the case?��(7.) Why cannot radial running joints be maintained in machines?��(8.) Describe the mechanism in common use for sustaining the weight of turbine wheels, and the thrust of propeller shafts. TWO:Professor John Sweet of Cornell University, in America, while delivering an address to the mechanical engineering classes, during the same year, made use of the following words: "It is [5] not what you 'know' that you will be paid for; it is what you can 'perform,' that must measure the value of what you learn here." These few words contain a truth which deserves to be earnestly considered by every student engineer or apprentice; as a maxim it will come forth and apply to nearly everything in subsequent practice.The parallel between Aenesid��mus and Protagoras would become still more complete were it true that the Alexandrian philosopher also sought to base his Scepticism on the Heracleitean theory of Nature, arguing that contradictory assertions are necessitated by the presence of contradictory properties in every object.