1926-02-27 — Page 10

PNEUMATIC AGITATORS.

WAYS OF ARRANGING.

THE HONGKONG TELEGRAPH,

wards, in the middle of the liquid mass. Alternately, a series of Jets may be arranged around the sides of the containing vessel, their nozzles directed towards the centre of the fluid mass. Where Any source of compressed air only gentle agitation is required, supply can be readily adapted for the air should be introduced Pipes through one or more perforated the agitation of liquids. used should, of course, be clean pipes, arranged on the bottom of and not subject to corrosion by the containing tank. If the per-

MOTORING SUPPLEMENT.

UNIFORM ROAD WARNINGS.

STANDARD SIGNALS SUGGESTED IN U.S.A.

SATURDAY, FEBRUARY

signals and many other forms of signalling d

SPORTING CYCLISTS AND THE RED REAR LIGHTS

sands of their them support the compul rad rear Ught on cycleb, which tend, will reduce acel help motorists at dark and make the roads safer for all drivera.

One committee in this research work made a complete study of signals and traffic control in cities of more than 100,000 population.

Another committee studied the A large number of cyclist. Under the present conditions it relative visibility of coloured motor oyclist, and other members is very difficult for motorists to (Special Report to the Hongkong Telegraph.)

lights now in use, going even so of the Sporting Protection Branch, pick out cyclists, who, in pitch far as to consider their visibility National Workmen's Constitu- dark nights, are often travelling Three years of intensiva re Those interested in this study against certain" backgrounds and tional Council, Thornton Heath, two, and even three, abreast, to representing various conditions of atmos- have declared themselves in the danger of themselves and the liquid mechanical agitators is bottom, the rising bubbles of air yielded a standard code of signals automobile manufacturers and phere, dust, for or rain, favour of a clause in the Roads others. The association would the liquid dealt with. One advan-forations be turned to face the search and study have finally included

Accessory A third committee studied the Vehicles Bill making it compul- also like to see a clause in the the entire absence of oil or grease, will be more evenly distributed; and signal lights, to be recom-owners, automobile "no lubrication being necessary, and if a suitable valve is pro-manded for general use through-makers, railroads and the Inter-non-luminous signs and signalsory for cyclists to carry a red new Bill that cycilsts should only state Commerce Commission, in- and suggested appropriate colours, rear light on their machines at ride two abreast in daylight, and This code is now in the hands surance companies, scientião and forms and symbols for various night for: their own protection, single after dark. Those wishing

Engineering technical societies and other

In certain applications the air vided, no liquid will enter the air out the country. g used may serve the additional pipe when the pressure is cut off.) purpose of oxidation. The agitat-To ensure uniformity in agitation of the American Ing jets may be arranged in the most. remoto perforations several ways. One method la to should be larger but more closely insert a single jet, directed down-spaced than those near the inlet.

G. W. K.

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Standards Committee, which is to organizations having an adminis- sponsor the movement. for its trative interest in this work. nation-wide adoption."

Fifty national organizations are represented on this committee and

three sponsors of national repute are backing the recommendations. These are the U.S. Bureau of Standarde, the National Safety Council and the American Asso- ciation of State Highway Officials.

Covers All Phases.

The scope of the study covered the use of coloured lights on high

at various ways, streets and crossings; their use for signals of railroads; co-ordination of colour form, position and number of signals; colours for non-luminous

uses.

Yellow Better Than Red. Out of this thorough research comes the new code for standard signals, Standard

for signs various types of crossings have beon dovised, with standard Colours for colours for each. headlights and tail lights, as well as other forms of signal lights have been established and are re- commended for general adoption.

One of the most significant and-- ings is that yellow is the proper colour for tail lights, indicating caution rather than stop, the signal supposed to be indicated by red.

Red, however, is recommended because of the colour's general adoption. If a changé is made, the committed suggests, it should be from red to yellow.

In addition to a uniform code, based on these recommendations, the committee sees the importance a campaign to educate the public Into the proper knowledga and use of the standard algnals.

of

BIG BUS PATRONAGE.

Three big city bus companies in New York, Chicago and St. Louis carried 140,000,000 passen gers in the first 11 months of 1925.

SALT CUTS ICE.

Cleveland has found a way to clean the streets after a heavy snow and make motoring safe. After every snow storm salt is scattered over the street. salt helps to cause quick melting of the ice.

The

and to make the roads safer far to support the efforts of the motorists and other users.The Council to get the clauses Insert- Council have notified the Miniatored in the Bill should writs to the of Transport that several thou-hon secretary of the ameciation.

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