My Web Site Page 281 Ovations 05Cake Placebo chose the topics covered by My Web Site Page 281 without reflecting upon the choices others have made. Flapping your arms and quacking like a duck when people try to run you over in their SUVs is another way to look at things in a different light. |
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In Babcock & Wilcox boilers the standard baffle arrangement is such as to allow the installation of a superheater without in any way altering the path of the gases from furnace to stack, or requiring a change in the boiler design. In certain water-tube boilers the baffle arrangement is such that if a superheater is to be installed a complete change in the ordinary baffle design is necessary. Frequently to insure sufficiently hot gas striking the heating surfaces, a portion is by-passed directly from the furnace to the superheater chamber without passing over any of the boiler heating surfaces. Any such arrangement will lead to a decrease in economy and the use of boilers requiring it should be avoided. Capacity--Babcock & Wilcox boilers are run successfully in every-day practice at higher ratings than any other boilers in practical service. The capacities thus obtainable are due directly to the efficient circulation already pointed out. Inasmuch as the construction utilizing headers has a direct bearing in producing such circulation, it is also connected with the high capacities obtainable with this apparatus. Where intelligently handled and kept properly cleaned, Babcock & Wilcox boilers are operated in many plants at from 200 to 225 per cent of their rated evaporative capacity and it is not unusual for them to be operated at 300 per cent of such rated capacity during periods of peak load. |
In considering what is and what is not a good slag, certain chemical properties are of importance. If a mixture of many substances be fused and allowed to solidify in a crucible, there will be found some or all of the following. At the bottom of the crucible (fig. 4) a button of metal, resting on this a speise; then a regulus, next a slag made up of silicates and borates and metallic oxides, and lastly, on the top another layer of slag, mainly made up of fusible chlorides and sulphates. In assaying operations the object is generally to concentrate the metal sought for in a button of metal, speise or regulus, and to leave the earthy and other impurities as far as possible in the slag; whether there be one or two layers of slag is a matter of indifference;[3] but the chemical action of the lower layer upon the speise, or regulus, or metal, is of great importance. |
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The Death of the Virgin is the last of the six chapels inside the church itself. The Apostles, who of course are present, have all of them real hair, but, if I may say so, they want a wash and a brushup so very badly that I cannot feel any confidence in writing about them. I should say that, take them all round, they are a good average sample of apostle as apostles generally go. Two or three of them are nervously anxious to find appropriate quotations in books that lie open before them, which they are searching with eager haste; but I do not see one figure about which I should like to say positively that it is either good or bad. There is a good bust of a man, matching the one in the Birth of the Virgin chapel, which is said to be a portrait of Giovanni d'Enrico, but it is not known whom it represents. | ||
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