Popular Science Monthly 



341 



A 



This Belt Breaks All Records 



GIGANTIC conveyor - belt which 

 has recently been installed in a 

 California sugar refinery is said to have 

 broken all records in the conveying of 

 sugar. The belt is truly remarkable in 

 size, being one thousand 

 four hundred and forty- 

 three feet long, thirty-six 

 inches wide, and weighing 

 nearly six tons. 



In its operation this con- 

 veyor continually sustains 

 a load of sixty bags of 

 sugar, a total weight of 

 seven thousand five hun- 

 dred pounds. These bags 

 are delivered to the belt 

 every nine seconds and are 

 carried to their destination 

 at great speed, as the belt 

 niake^ twenty-six complete 

 revolutions every eight 

 hours. 



At the close of its service this belt will 

 have exceeded the remarkable record 

 established by its predecessor, which 

 carried over two billion pounds of sugar 

 before there were any evidences of wear. 



The Largest Card Holder in 

 the World 



THE tree in the accompanying pic- 

 ture is rightly named when it is 

 called "the largest card case in the 

 world" for it is literally plastered with 



A belt which is destined to carry over two 

 billion pounds of sugar before it wears out 



Dehvering Mail by Aeroplane 



IN his annual report Postmaster Gen- 

 eral liurleson has recommended the 

 appropriation of fifty thousand dollars 

 for the establishment of aerial postal 

 routes. He has submitted a list of 

 routes over which much time could be 

 saved by delivering the mail by aero- 

 planes instead of by railroad. 



This is where you leave your card, with thousands 



of others, to record your visit to the famous California 



redwoods 



thousands upon thousands of cards of 

 all kinds. 



The tree is one of many in the fa- 

 mous redwood grove of big trees in the 

 Santa Cruz mountains and is about 

 eighty miles from San Francisco. Each 

 year finds the tree covered with a fresh 

 coat of calling cards, personal cards, 

 business cards and other cards too nu- 

 merous to mention. Not only is the 

 outside made use of but the interior, 

 which, due to some forest fire in the past 

 is hollowed out into a large room, is 

 thickly covered with pasteboards. 



The exposition at San Francisco at- 

 tracted more people to the grove than 

 usual and a close observation will reveal 

 the cards of foreign ambassadors, ex- 

 presidents of the United States. Sena- 

 tors and so on down to the scrap of pa- 

 per placed on the tree by a passing 

 "knight of the road." 



Although there are dozens of trees 

 many times larger than this one. it is the 

 onlv one used as a card-case. 



w 



'Hl-'N the new water system of 

 Madrid. Spain, is completed, it is 

 estimated that the supply will exceed 

 two hundred and six tliousand gallons 

 per minute, and that, in addition, there 

 will be a hydro-electric production of 

 twenty-one thousand horsepower. 



