MANUAL OP PACK TEANSPOETATION. 179 



To strengthen the aparejo an additional rib cut 1 inch shorter may 

 be employed between the first and second ribs under the collar of the 

 aparejo as provided on the boots and saddle bars, of castings, as per 

 sample at JeffersonvUle Depot, Indiana. For aparejos cut 22 inches 

 wide, the frame and castings are 2 inches less in width, and carry one 

 rib less than for aparejos cut 24 inches wide. 



HICKORY RIBS FOR ALUMINUM CASTINGS. 



(22) To be made of second-growth hickory, free from knots and 

 blemishes. Ribs for 62-inch aparejos to be 20; to be cut 25 inches 

 long, 1 inch wide and three-eighths inch thick; composed of two half 

 sets of 10 ribs, each half set to be equally alike, and to be numbered 

 serially from 1 to 10; numbers to be stamped parallel with length of 

 stick placed 6 inches from butt end of stick. Each half set of 10 ribs 

 to be tapered in the following manner: Nos. 1, 2, and 3 are for the 

 collar of the aparejo and are not provided with taper; No. 2, however, 

 is cut 1 inch snorter than Nos. 1 and 3. No. 4 will be provided with a 

 taper on one side, commencing 15 inches from butt to opposite end 

 at top of stick, thickness at top end to be three-sixteenths of an inch. 



This provides a taper of 10 inches for No. 4. Each successive rib 

 will have an increase in taper of IJ inches. Thus, No. 4 has 10 

 inches and No. 10 has 19 inches in length of taper; that is, 6 inches 

 from butt end to top of rib. 



No. 2, however, will have a taper on right edge of one-fourth of an 

 inch, commencing 5 inches from top end of rib, holding numbered 

 side up. This is to permit No. 2 to be placed in position in space be- 

 tween slots Nos. 1 and 2 of saddle bar, and slot 2, as provided in boot 

 bar. For each complete set of ribs from a 62-inch to a 52-inch aparejo 

 a successive decrease of 1 inch in length will be provided. 



That is, from 25 inches in length for a 62-inch aparejo, to 20 inches 

 in length for a 52-inch aparejo. However, for 56, 54, and 62 inch 

 aparejo, a uniform width of 22 inches is provided. This provision 



fives a complete set of 18 ribs composed of two half sets of 9 ribs, to 

 e tapered m siitiilar manner as provided for a 62-inch aparejo from 

 No. 4 to No. 9; that is, a successive gain of 10 inches for No. 4 to 17i 

 inches for No. 9. Aluminum castings for saddle and boot bars and 

 key bars (brass), to be 2 inches shorter for aparejos 22 inches wide 

 than for aparejos 24 inches wide, as per sample furnished. All work 

 to be done in a first-class and accurate manner. 



BIDING SADDLES (PACKERS'), QUARTERMASTER'S (sTOCK) CORPS. 



Specifications for full-rigged riding saddle. 



(Figs. Ill, 112, lis.! 



(1) Sec. 131. This saddle is furnished only for use of the personnel 

 of pack trains and pack-train sections, wagon masters, and assistant 

 wagon masters. (Design modified by H. W. Daly.) 



1 Tree.— To be No. 1013, modified "Wild West" tree, from 15 to 

 16 iiich seat, 5-inch fork, 2f-inch oval head, steel fork, grooved bars, 



beef-hide cover. . , , / x^ 



2. Rigging.S&ddle to be full rigged, with two girths (cotton pre- 

 ferred) of 18 strands for the front and 24 strands for the rear girth, 

 and to be of two bar girths, with connecting straps and buckle. 



