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BULLETIN 111, U. S. DEPARTMENT OF AGRICULTURE. 



used, are attached to the end of the main loading line. The crotch 

 lines are attached to the logs by means of hooks, tongs, or slings 

 (figs. 51, 61, and 62). Where more power is necessary because of the 

 size of the logs, a 11 by 2 inch fall block in addition to the corner 

 block is used (fig. 60). In such cases, the main loading line, gen- 

 erally seven-eighths inch in diameter, passes through the corner 

 block, then through the fall block, and thence to the top of the gin 

 pole, where a " tail hold " is taken. 



This method followed the parbuckle method, and was very gen- 

 erally used. The last three or four years it has been giving way 



Fig. 61. — Overhead loading system. 



to overhead loading methods. It requires landings (of the type 

 shown in fig. 60), which is its most objectionable feature. Landings 

 adapted for this method must be made small because of their cost, 

 and so afford insufficient storage space. This method is not so fast as 

 overhead methods, neither does it allow the loaders the privilege at 

 all times of deciding the order in which the logs shall be loaded. 



The fixed investment in equipment at one side with this method, 

 where the power is furnished by a separate loading engine and no 

 fall block is used, amounts to about $2,718, as follows: 



1 7 by 10 inch double-drum loading engine $1, 62.o 



1 set of guy lines 100 



1 main loading line j 85 



1 spotting line 45 



3 14 by 2 inch loading block.s 63 



Loading-engine repair parts and materials 75 



Loading-engine sled 250 



Oil-burner equipment, including oil and water tank 375 



Miscellaneous equipment 100 



Total 2,718 



