Popular Science Monthhf 



339 



Piling Lumber in Forty-Foot 

 Monumental Stacks 



A MECHANICAL lumber - stacker 

 which has recently been placed on 

 the market has made possible a ^reat 

 saving in lumber yard space in our large 

 cities. The Edison Monthly states that 

 it is now possible to pile planks to the 

 height of forty or more feet with a crew 

 of four men, while in the past piles sel- 

 dom reached a greater height than 

 twenty-four feet. 



The machine is electrically operated, 

 and consists of a steel skeleton tower of 

 the desired height, over which revolve 

 two endless chains. Carriers are attached 

 to these chains at short interxals. C)n 

 these, planks are placed by workmen on 

 the ground. Ten boards a minute are 

 delivered by the carriers to the men on 

 the top of the pile. One of these stack- 



This electric stacker will pile lumber forty 

 feet high with perfect facility 



This round barn is made of reinforced 



concrete, eight inches thick. The lofv. 



has neither beams nor posts 



ers is said to have piled one hundred and 

 twenty-five thousand feet of lumber in 



ten hours. 



Circular Barn Built of Concrete 



APIOXEER reinforced concrete, 

 round barn, the first of its kind, and 

 onl}' one known to exist in the United 

 States, has been completed on the farm 

 of Harry McDaniel, near Dover, Del. 



The barn is seventy-two feet in di- 

 ameter and sixty-four feet high, the 

 concrete walls being twenty feet high 

 and eight inches thick, reinforced. It 

 has a cupola five feet high and ten feet 

 in diameter, with eight windows. It 

 took thirty-one thousand shingles to 

 cover the building. 



The most remarkable part of tlie 

 building is the loft, which has no posts, 

 no beams, no girders of any kind. The 

 loft has a capacity of about three hun- 

 dred tons of hay. There is a circular 

 track, thirty-five feet above the floor, 

 used in conveying the hay to the remot- 

 est part of the loft. 



The lower floor of the barn has thirty 

 stalls for milch cows and eighteen stalls 

 for horses, with a space in the center 

 for twenty-five head of young stock. 

 The building is two hundred and twenty- 

 six feet in circumference. 



ACCIDENT insurance is compulsory 

 among the workmen in Holland, 

 but other insurance is optional. 



