TWO:There is, however, a principle in hydraulic machinery that must be taken into account, in comparing it with positively geared mechanism, which often leads to loss of power that in many cases will overbalance any gain derived from the peculiar action of hydraulic apparatus. I allude to the loss of power incident to dealing with an inelastic medium, where the amount of force expended is constant, regardless of the resistance offered. A hydraulic crane, for instance, consumes power in proportion to its movements, and not as the amount of duty performed; it takes the same quantity of water to fill the cylinders of such cranes, whether the water exert much or little force in moving the pistons. The difference between employing elastic mediums like air and steam, and an inelastic medium like water, for transmitting force in performing irregular duty, has been already alluded to, and forms a very interesting study for a student in mechanics, leading, as it does, to the solution of many problems concerning the use and effect of power.
TWO:"It's a great discovery, sir," said Prout. "I have found the brother of the murdered man."
TWO:
TWO:The next day I had the pleasure of an interview with Cardinal Mercier, whose residence in Antwerp I had been able to find out at last. A wealthy lady had offered his Eminence her grand house. In one of the rooms I waited for the arrival of the cardinal, the Metropolitan of the Belgian Church Provinces, who, both as a prelate and a patriot, had been tried so sorely in this war, which ravaged both his university town and his episcopal town. Although he was exceedingly busy, his Eminence had the kindness to grant me an audience.It seems hard to deprive engineering pursuits of the romance that is often attached to the business, and bring it down to a matter of commercial gain; but it is best to deal with facts, especially when such facts have an immediate bearing upon the general object in view. There is no intention in these remarks of disparaging the works of many noble men, who have given their means, their time, and sometimes their lives, to the advancement of the industrial arts, without hope or desire of any other reward than the satisfaction of having performed a duty; but we are dealing with facts, and no false colouring should prevent a learner from forming practical estimates of practical matters.