FIGHTING A MENACE

Sun (Auckland), Volume III, Issue 722, 23 July 1929, Page 6

FIGHTING A MENACE

HUGE LOSS FROM RUST The world-wide use of steel has re. sulted in an energetic fight in the laboratories and experimental work. shops of all manufacturers who haw [0 use steel in the construction of tin articles for which they are respond“; in order to discover some effective treatment which shall make it imper. vious to the menace caused by rust. Sir Robert Hadfield, probably the greatest steel expert in the world, has estimated that the world [om £500.000,000 per annum owing to the corrosion of steel. Experts aim nt' rustproof metals, but until these are available the war must proceed on present lines, consisting chiefly of painting. ‘ The struggle is deadly, and although many believe th-at by painting with! good anti-corrosive paints, metal structures last indefinitely, the End. Tower and other such engineering masterpieces prove that such is not, always the case. In 1889 three colla‘ of a special mixture of red lea and linseed oil. and a. final coat of think paint. were given to every portion'ol the Tower, but in two years rust m' ‘found eating through that covering. 1 The mighty Forth Bridge provides another striking example of the celle- ' iless struggle against the rust fiend, Ithirty painters being engaged euntinuously coating it with pre-l servatives. Fifty tons of paint "3‘ used in covering the mile and a-hlli, bridge, three years being the time occupied in completing the huge m; which must then be started over again. " The perfect condition of the bridge. however, is the reward for this unceasing efiort, for after 46 years of continuous exposure to the elements {it is still the only bridge in the world lover which express trains can thundel' fat 60 mile an hour. The British motor vehicle mm facturers view the deterioration which is caused by rust just as seriously 11, do those responsible for the erecthl and maintenance of might structures. and they are engaged also in ceaseless experiments to discover a. prom! for making all metal in their vehlclefi rust-proof. .

A BOOKLET FOR POWER FARMERS

We have just received a very “58M booklet entitled “Long Life and llolcj Power for Your Tractor." TM owners are ever on the look—out hf information which will help them by the care and operation of their lIK‘ chines. In this booklet is much Vii-7‘ able data on the subject. 1‘ The booklet shows by diagram: and explanations how six troublflrfi scored cylinders, carbon deposits, V 011; piston rings, blow-by, gummed velvet»: worn bearings-can be avoided by a practice of correct lubrication. 3‘: the regular changing of oil at 5“ intervals. The draining and mum'of the sump is a. very important opt!“ ation and should be done with 1’ jutmost care. ‘ Tractor owners will readily appredt. iate the valuable information contamd. in “Long Life and More Power K: iYour Tractor." published by ill: 'Vacuum Oil Company Pty., Ltd, 11", ions as authorities on correct lubflfl'. tion and tractor fuel. Copies of 9” ibookiet may he obtained free on 0’ plication to any branch or represenu': tive of that company. i FUEL RESOURCES . The eternal question of how 101153 the natural petrol supply will last 1’ again attracting attention in AmericaI According to a book recently publish”l the existing wells in the United State! are capable of producing 5,300,000.”.0 barrels of petroleum by flowing and pumping. In addition. a. proportion of a 1"" ther 26.000,UUU,0UU barrels will be T" icoVei-abie, while 25,000,000,000 hum” [of motor fuel can be obtained m pm atio 11 a 1 oil shale depot“ (92.000,000,000 from coal. 8‘ “2,000,000.000 from liguite. The W ibilities of 1.100.000.000 acres at '3' Iprospectcd land have not been coil" ered. It is anticipated that 50 yearshefl, 'there will be 54.000000 motoraflil the United States alone, and St {3 present rate of consumption M machines would use up 550.0001“, barrels in 1975. It is expected~ w ever. that the motor engine will '5 come twice as efficient than it 18 ”7 and in that event. presuming the“; mileage is covered. the petroérfisumption would not be much 7 than it is at the present time. J