WIRELESS NOTES

Evening Star, Issue 18919, 18 April 1925, Page 19

WIRELESS NOTES

[By Electron.} STANDARD TIME. Thorn still is some confusion regarding the conversion of local time to that of other countries, and though I have explained the method to be adopted in previous notes, for the benefit of those who have flot these for reference I will again explain it. Greenwich time is taken as a standard, and the time of other countries slated as bo many hours slow or fast compared with Greenwich time. Franco, Spain, and Portugal have the same time as Greenwich time, so present no difficulty. The United States is divided into four time zones —tho eastern zone, central zone, mountain zone, and Pacific zone. Eastern zone time is 5 Lours slow, central zone 6 hours slow, mountain zone 7 hours slow, and Pacific zone 8 hours slow. Mew Zealand time, on the other hand, is 1U hours fast, so that the difference between Pacific zone and New Zealand time is 19}, hours. Regarding tho respective dates,"" from midnight to 4.30 a.m., Pacific zone time is tho same date here; after 4.30 a.ra. it is the date following hero. For example, 6 a.m. of tho 15Ui Pacific time wi 11 bo 1.30 a.m. of the 16th Now Zealand time. In the case of eastern zone time from midnight to 7.30 is the same date here, after 7.30 being tho following date. —Conversion Table.—• 6 p.m. New Zealand time is equivalent to 5.30 a.m. of the same day in England; 1.30 a.ra. of the same day in eastern zone (New York, etc.); 0.50 a.rn. of the same dav in central zone; 11.30 p.m. of the day before in mountain zone; 10.30 p.m. of tho day before in Pacific zone (San Francisco, etc.). From this table you can readily calculate what any other time will correspond with by adding or subtracting tho required number of hours. If, for instance, you ffesiro to find what local lime corresponds to 4 a.m. in New York, proceed as followsl.3o a.m. New York time is 6 p.m. of the same day hero; therefore 4 a.m. will bo 2} hours later—that is, 8.50 p.m. of the same day here. Since most listeners use their receivers only from 6 p.m. to 11 p.m., this is tho most useful time to convert to. Remember that in tho case of the. Pacific zone (KGO, etc.) 10.30 of tho 15th will bo 6 p.m. of the 16th in New Zealand, so (hat we really hear what is happening the day before ns. Any listener who is not sure in \vhich time zone any particular station is located may obtain the information by sending a (stamped addressed envelope to “ Electron, with the call and town of tho required station. RADIO WORLD’S FAIR. Tim new offices of the Second Radio World’s Fair on tho fifteenth floor of the ‘ Times ’ Building, Broadway, were formally opened on February 27, and Directors "Henman and Kerr are arranging the final details of Dm big exposition which is to be held in the 258th Field Artillery “Mrmory from September 14 to 19. The 1925 sliow wil bo twice as largo as the First Radio World’s Fair, which completely filled both Madison Square Garden and the 69th Regiment Armory, and broke all records for attendance and business .transacted. Thp huge armory is the only building in Greater New York large enough to house all of the 325 exhibits on the ground floor, and still leave room enough to accommodate a daily attendance of 30,C00 people. It is the largest building of its kind in America. The auditorium measures 300 ft by 600 ft, and does not contain a single giilar. The gijuara ■

footage of the open floor space is exactly five times that of tho present Madison Square Garden. There will be 275 American manufacturers and fifty of the leading foreign concerns among the exhibitore, and tho value of tho .devices on display will approximate ten million dollars. Public demonstrations will be held every afternoon and evening, in which a score of internationally famous wireless engineers will participate. Several will introduce inventions of a startling . character. Two large, seel ions will he devoted t-> new inventions and amateur built scls. .Amateurs and professional radio experts of all nations are cordially invited to take part in these competitions, for which no registration fee will he required. Entry blanks with full particulars will ho furnished on application. Gold medals, silver cups, and cash prizes will be, awarded by a jury of eminent authorities. BROADCASTING. In order that listeners may receive a broadcast ing service immediately, the, Po.-Jmnfiter-General is allowing provisional arrangements for the maintenance of broadcasting services in each of the four main centres. A station in each of these centres is to he, subsidised to tho ex ten), of £ls weekly from iho revenue ft"tn tho new license fees. Station J.VA, Auckland. inaugurated the now system on April 1 under a temporary broad easting board consisting of the district telegraph j engineer and radio inspector, a. represent,-!- | Live of the Auckland radio traders, and i a member of tho Auckland Radio Association representing the local listeners. It is underslood that contributions fr-mt dealers will bring the total available, for broadcasting to about £2O weekly'. Station IYA has of late been (lie best broad- | casting station in tho dominion, ami listener hero in the south will bo pleased to hoar of tho progress!veness of the people concerned. So far as oilier centres are concerned no news regarding their movements is yet available. BROADCASTING N 1 AG ARA. The promised broadcast ing of the roar of the waters of Niagara by KDKA. in Pittsburg, for English listeners fell ratlr-r flat, to "the disappointment of all concerned. All arrangements were made for the. transmission —microphones were installed at the, falls, and an hour set for the broadcast—but, although many ’’Stenerl faithfully after (he announcement, not n sound came over their phones, Ihe falls were completely frozen over. A LARGE HAUL. Thieves made away with hundreds of cubic feet of wireless apparatus when they raided tho branch factory of a radio manufacturer in England and stole JOB loud speakers. They made nearly a (oiiipleto disappearance with their haul, for up to date only sixteen of the missing instruments huvo been discovered. Ihe manufacturers have asked purchasers to make sure that tho serial number of the speakers has not been defaced, .and that the guarantee label is attached. INFANTILE PARALYSIS. HOW TO AVOID INFECTION. Thera is no saying where au epidemic, unchecked will end. Every moans available should be used to repel germs. Future discoveries wil probably prove, that NAZOL is playing an important part in checking tho spread of Infantile Paralysis. Tho powerful antiseptics and germicides in NAZOL protect the mucous membranes of nose, mouth, and throat, tho usual “way in” of disease germs. With cotton wool or liltfe finger, smear a. mixture of NAZOL and Olivo Oil (three tablespoonfuls of pure Olivo Oil to one bottlo of NAZOL) well up the nostrils, many times daily and last thing at night. A few drops should also bo sipped. AH chemists sell NAZOL at Is 6d.—lAdvt.]