MANUAL OF PACK TEANSPOETATION. 177 



RIBBING POK DALY APAREJOS. 



(17) The ribbing consists of the followiag: 

 Two saddle bars (wood), right and left. 

 Two boot bars (wood), right and left. 



Eighteen hickory ribs, consisting of two half sets of nine each, 

 equally alike, with 6 pounds of suitable soft hay for padding or fiUing 

 for each aparejo. 



Two locking bars for saddle bars 19|- inches long. If inches wide, 

 gauge 16. 



Key bars for locking bars to be 23 inches long, five-eighths of an 

 inch wide, and three thirty-seconds of an inch thick. 



Locking bar for boot bar to be 19f inches long and 1 inch wide, 

 gauge 16. 



Sixty flathead brass screws three-fourths of an inch. No. 6. 



Saddle hars. — ^Take two pieces of clear basswood, free of blemishes, 

 21 inches long, 7 inches wide, and 2 inches thick. 



Saddle bars, right and left, to be cut in at one end with two offsets. 



First offset to be cut at right angles, 3J inches at one end, one way, 

 by 2| inches from upper edge. 



Second offset to be cut at right angles at same upper and front end 

 51 inches, one way, by 1 inch from upper edge. 



These offsets are cut and shaped to fit under the coUar of the apare- 

 jos and are considered the forward or front end of saddle bars. 



Now space off "gains" of nine equal parts, commencing at both 

 ends to center of "gain," which must be 2xi inches; width of gains 

 to be IJ inches; length of gains, 3f inches; depth of gains to be 

 three-fourths of an inch. 



Now gain for brass key bar, three-fourths of an inch wide and 

 three-sixteenths of an inch deep. Position of gain for key bar to be 

 3f inches from upper edge to center of gain, extending from front to 

 rear. 



Next gain for "locking bar," If inches wide and one-sixteenth of an 

 inch deep, 19| inches long, spaced equally distant from each end, cen- 

 ter of locking bar over center of key bar. 



Locking har for saddle har. — ^To be of sheet brass 19 inches long. 

 If inches wide, and one-sixteenth of an inch thick (gauge 16). 



Locking bar is spaced off into nine equal parts, allowing three- 

 fourths of an inch to fit into gains. This portion wUl be turned at 

 right angles so as to fit snugly against the wall of gain, and provided 

 with 20 holes to receive flathead brass screws three-fourths of an 

 inch, No. 6, and screwed down to saddle bar. 



Key har. — Key bar to be of spring brass 23 inches long, five-eighths 

 of an' inch wide, and three thirty-seconds of an inch thick, rounded 

 and slightly tapered at one end; the reverse or opposite end to be 

 rounded and provided with a hole three-eighths of an inch from end, 

 this to receive leather thong; diameter of hole, three-sixteenths of an 

 inch. 



Saddle bars, right and left, to be shaped on both sides as per sample 

 furnished. 



(1 8) Boot hars. — ^Take two pieces of clear basswood free of blem- 

 ishes 21 inches long, 6 inches wide, and 3 inches thick. 



Now space off "gains" of nine equal parts exactly similar to those 

 provided in saddle bars. Length of gains, 4f inches. 

 75927°— 17 12 



