128 



CEMENTS, LIMES, AND PLASTERS. 



STANDARDS FOR PACKING, ETC. At a meeting of the hydrated- 

 lime manufacturers of the United States, held in July, 1904, the fol- 

 lowing standards for packing and selling the product were adopted.* 



Bags. A heavy, closely woven burlap or duck bag, containing 

 100 Ibs., 20 bags to the ton. A paper bag containing 40 Ibs., 50 bags 

 to the ton. 



Quotations. All quotations are made including the cost of the 

 package, no bulk quotations being made. 



Returned sacks. The burlap or duck bags will be repurchased from 

 the customer at ten cents each when returned to the mill in good con- 

 dition, freight prepaid. 



Terms of settlement. A discount of 1 per cent will be allowed for 

 cash in ten days, the discount to be taken on the full price, including 

 the bags f. o. b. manufacturer's plant or shipping-point. Net cash 

 thirty days. 



COST OF EQUIPMENT. The following estimate of cost of equipment, 

 etc., has been furnished by Mr. B. E. Eldred: 



Product per hour 5 tons 10 tons 



Cost of plant and equipment $8,000 $10,000 



Men required for operation 4-5 6-8 



Maximum power required 35 H.P. 50 H.P. 



Average power throughout day 15 " 20 " 



In estimating the cost of lime hydrating, it should be recollected that 

 the product gains greatly in weight during the process. A ton of quick- 

 lime (2000 Ibs.) will give from 2400 to 2600 Ibs. hydrated lime. 



Tests of hydrated lime. The following tests of two kinds of hydrated 

 lime, while made principally for the purposes of comparing high-calcium 

 with magnesian limes, will serve to give an idea of the tensile strength 

 of hydrated lime in general. 



TABLE 46. 



TENSILE STRENGTH OF MAGNESIAN AND NON-MAGNESIAN HYDRATED LIME. 



Engineering News, vol. 51. p. 543. June 9, 1904. 



The tests above quoted were made by Mr. S. T. Brigham on hydrated 

 lime prepared by the Dodge process. The mortar in each case was 



Engineering News, vol. 52 p. 220, Sept. 8, 1904. 





