National Geographic : 1940 Feb
(£) Merlin Mmshall HARD LUCK, THAT BLOWOUT! BUT A BOON TO THESE ALGERIANS It's an even bet among explorers whether kerosene cans or old tires reach more remote places of this planet. Taking the hint, perhaps, from Chinese coolies and African tribesmen, American manufacturers use more and more reclaimed rubber from old tires to make thick soles (page 178). Photograph by J.Baylor Roberts TWO CANS CATCH RUBBER DROPS FROM THIS HIGH YIELDER The Javanese on a Goodyear plantation inSumatra ispouring one cup of milky latex into his tapping can. The angle ofthe cuts usually isabout 30 degrees to permit free flow. Ordinary tapping does not hurt atree; only sturdy ones can stand such double duty.