1412 



AM ICRICAN l-OKILSTRV 



sIk)u1(1 go far toward solving this difliculty. In llic ex- incrcial practicability will umluuhtciUy time its wide- 



pcrinients now tinder way to determine the possibilities spread or general adoption. As a manufacturing process, 



of various built-uj) forms for heavy structural use and laminated construction is in a great many cases more 



the efficiency of different tyjies of joints and fastenings. c.x])ensive than solid-wood construction, and there is an 



glued laminations are not 



vet being used, although it 



is not imijrobable that when 



the effect of aging on the 



strength of glue becomes 



detinitely established, glued 



joints may find siructural 



application. 



l-'or smaller wooden arti- 

 cles, built-u]) wood has im- 

 mediate a])plication not 

 only in replacing solid ma- 

 terial but in cxieiuling the 

 utilization of small sizes 

 and low grades. Some of 

 these possibilities are for 

 wagon tongues, bolsters. 

 wheel hubs and rims, plow 

 beams, sled runners, auto- 

 moblie bodies, gun stocks, 

 agricultural imjilements. ath- 

 letic goods, artificial limbs, 

 hat blocks, ladder rails, 

 shoe lasts, porch columns 

 and outside doors. i'he 



I.aboratory has already made up as experiments 

 sets of niai)lc bowling ])ins and shoe lasts, oak wheel 



I.N THE M.\NUFACTURE OF LAMI\.\TED BOWI^ING PINS THE 

 BLOCK H.AVIXG BEE.V ROUGH KD OfT ON THE B.\XD S.WV IS 

 PCT IN THE TI'RN'IXG L.\THK .\ND TURNED TO THE PROPER 

 P.ATTERN. .\FTER .\ SUIT.ABLE FINISH H.AS BEEN .\PPLIED THE 

 PINS .ARE RE,\DV FOR TEST. 



element of waste in the 

 large amount of saw kerf. 

 It would appear offhand 

 that, so long as present elif- 

 lerentials in the prices of 

 thin and thick lumber and 

 in various species prevail, 

 built-u]) wood will have 

 great difficulty generally in 

 meeting competition. IJut 

 this is not altogether the 

 case and for the following 

 reasons : 



1. The drying or seasoning 

 costs are lessened by laminated 

 construction since thin lumber 

 can be much more rapidly dried 

 and with less loss than thick 

 lumber. 



2. The manufacturing loss 

 in solid wood, especially where 

 steam bending is required, as 

 in wheel rims and certain kinds 

 of furniture, promises to be 

 very greatly reduced by lami- 

 nated construction. 



3. Scrap ends and waste 

 material may often be fully utilized in built-up wood. 



4. In the manufacturing of certain articles now requiring 

 select high grades, low grades obtained at cheaper prices may 

 be substituted. 



5. Built-up wood makes possible better and more uniform 

 seasoning of stock, and this in turn, makes possible a more 



■serviceable article and tends to eliminate price competition. 



6. The location of the nation's main sources of timber supply 

 in the far West will tend to make possible the local utilization 

 of built-up wood from other species in eastern and middle 



I.A.VIINATEI) BOWLING 1M.\S RKAI)^■ FOR TES,'' THE TEST CON 

 SISTS OF ACTUAL SERVICE IN A BOWLING i' LI.EV. A RECOKD 

 H-n.\G KEPT OF THE NUMBER OF GA.VIES PLAVEl) WITH THE 



rims, wagon bolsters and tongues and walnut gun slocks. 

 These articles are now made commercially from solid 

 wood, but the experiments arc in laminated construc- 

 tion, with the use of watcrjjroof casein glue in some cases 

 and blood albumin in others. The bowling pins, under 

 actual preliminary test in a local alley at Madison, gave 

 the same service as the solid pins. The testing of the 

 other laminated articles has not yet been completed. 



While the field for laminated construction of the fore- 

 going character is very extensive, the factor of com- 



.\EIER 2.M GA.MES THESE LA.XnXATEO ^0\^•LINC; i'lN.S ARE STILL 

 l\ SEKNTCKABLE CONDniOX. IN FACT THIS PARTICt'LAR SEP 

 IS. TO ALL INTENTS AND PURPOSES THE EQUAL OF SOLID I'INS. 



western regions, at i)rices comparable with or even below those 

 of solid wood shipped in from distant regions. 



These conditions, it will be apparent, will have a direct 

 bearing upon the final costs of built-up wood. It is 



