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Another turbine Atlantic liner
_August, I9O5.]
Notes and Comments.
137
pleased to be able to say that at no time has there been a very large percentage of adulteration of milk. There was a time, h o w e v e r , w h e n it s e e m e d t h a t t h e u s e o f m i l k p r e s e r v a t i v e s w a s .about to become quite general. The enforcement of the law relating to this subject nevertheless averted this impending ,evil. During the past summer about 3 or 4 per cent. of the samples of milk and cream examined were found to contain preservatives. ANOTHER TURBINE ATLANTIC LINER. Contemporaneously with the completion of the maiden voyage of the Nrst turbine Atlantic liner, the "Victorian," the sister ship "Virginian"i was running her speed trials on the Firth of Clyde, when she developed the very creditable speed of I9.8 knots an hour. Compared with the daily xecords of the fastest Atlantic liners, this performance is not, of course, xemarkable; but when we bear in mind that these tv¢o ships were designed -originally for a sea speed of about I7 knots an hour, it will be seen that •the accomplishment of nearly 20 knots on trial is one more tribute to the capacity of the marine turbine to exceed, when pushed to the limit, by a ~considerable margin the results for which it is designed. The "Victorian" ,showed a trial speed of a fraction over 19 knots an hour. Tb,e first ocean voyage of the "Victorian," which consumed 7 days 22 hours and 5o min.utes, was made under extremely unfavorable circumstances, as she started fin a gale of wind, encountered bad weather on the way across, and was obliged to g o considerably to the south of her natural course, as far south indeed as the latitude of New York, in order to avoid the icebergs, thereby lengthening her voyage by more than 3oo nautical miles. Moreover, it was stated by the captain that the boilers gave considerable trouble by priming. The maximum speed reached during the voyage was I6½ knots. The "'Virginian" completed her first voyage under favorable wather conditons in 6 days, 22 hours and 45 minutes. This is the fastest record. On the important question of vibration, the officers and passengers appear to be unanimous in stating that it was practically eliminated in these ships. This, of course, does not prove that there will be a similar absence of engine vibration when a liner with turbine engines is being driven at the speeds of 23 to ~3½ knots, at which the fastest of the German ships have been driven by their reciprocating engines. But it is fair to presume that even at such high speeds the vibration will be confined to that which comes £rom the propeller.--Scientitic American. COMPOSITE BRICKS OF UNUSUAL STRENGTH. A test made at Purdue University, Lafayette, Ind., of composite bricks ~nade at Indianapolis, of sand, cement and lime, showed a crushing strength of more than I5,Ooo pounds, as against 1,5oo pounds for an average clay brick and 3,500 pounds for an average faced brick. In transverse strength the composite brick showed a resistance of over 2,500 pounds.
Notes and Comments.
137
pleased to be able to say that at no time has there been a very large percentage of adulteration of milk. There was a time, h o w e v e r , w h e n it s e e m e d t h a t t h e u s e o f m i l k p r e s e r v a t i v e s w a s .about to become quite general. The enforcement of the law relating to this subject nevertheless averted this impending ,evil. During the past summer about 3 or 4 per cent. of the samples of milk and cream examined were found to contain preservatives. ANOTHER TURBINE ATLANTIC LINER. Contemporaneously with the completion of the maiden voyage of the Nrst turbine Atlantic liner, the "Victorian," the sister ship "Virginian"i was running her speed trials on the Firth of Clyde, when she developed the very creditable speed of I9.8 knots an hour. Compared with the daily xecords of the fastest Atlantic liners, this performance is not, of course, xemarkable; but when we bear in mind that these tv¢o ships were designed -originally for a sea speed of about I7 knots an hour, it will be seen that •the accomplishment of nearly 20 knots on trial is one more tribute to the capacity of the marine turbine to exceed, when pushed to the limit, by a ~considerable margin the results for which it is designed. The "Victorian" ,showed a trial speed of a fraction over 19 knots an hour. Tb,e first ocean voyage of the "Victorian," which consumed 7 days 22 hours and 5o min.utes, was made under extremely unfavorable circumstances, as she started fin a gale of wind, encountered bad weather on the way across, and was obliged to g o considerably to the south of her natural course, as far south indeed as the latitude of New York, in order to avoid the icebergs, thereby lengthening her voyage by more than 3oo nautical miles. Moreover, it was stated by the captain that the boilers gave considerable trouble by priming. The maximum speed reached during the voyage was I6½ knots. The "'Virginian" completed her first voyage under favorable wather conditons in 6 days, 22 hours and 45 minutes. This is the fastest record. On the important question of vibration, the officers and passengers appear to be unanimous in stating that it was practically eliminated in these ships. This, of course, does not prove that there will be a similar absence of engine vibration when a liner with turbine engines is being driven at the speeds of 23 to ~3½ knots, at which the fastest of the German ships have been driven by their reciprocating engines. But it is fair to presume that even at such high speeds the vibration will be confined to that which comes £rom the propeller.--Scientitic American. COMPOSITE BRICKS OF UNUSUAL STRENGTH. A test made at Purdue University, Lafayette, Ind., of composite bricks ~nade at Indianapolis, of sand, cement and lime, showed a crushing strength of more than I5,Ooo pounds, as against 1,5oo pounds for an average clay brick and 3,500 pounds for an average faced brick. In transverse strength the composite brick showed a resistance of over 2,500 pounds.