LIFTS AND HOISTS 



749 



6 feet per second. In modern American practice, express passenger lifts 

 are occasionally run at speeds of 8 to 10 feet per second. 



FIG. 365. Elevator with Chain Compensa- FIG. 366. Hydraulic Elevator with Water 

 tion for Hope Variation. Column Compensation. 



For very heavy lifting, such as is necessary in canal lifts, etc., where 

 loads up to 1,000 tons may be carried on a single ram, the direct-acting is 

 the only suitable type. 



