. Official proceedings . ndredthuoi) to eighty-three thousandths (.083) second, or a range ofseventy-three thousandths (.073) of a second. This exceedinglysmall margin requires that most careful and scientific attentionbe given to dimensions, quality of metal, quality of powder, airconditioning of the plant to hold the moisture content of thepowder within very narrow limits, etc., if successful manufac-ture on a large scale is to be possible. It also bespeaks amplelatitude where such can be given as there is plenty of the intri-^ate with which to contend. You may be interested to know that at
. Official proceedings . ndredthuoi) to eighty-three thousandths (.083) second, or a range ofseventy-three thousandths (.073) of a second. This exceedinglysmall margin requires that most careful and scientific attentionbe given to dimensions, quality of metal, quality of powder, airconditioning of the plant to hold the moisture content of thepowder within very narrow limits, etc., if successful manufac-ture on a large scale is to be possible. It also bespeaks amplelatitude where such can be given as there is plenty of the intri-^ate with which to contend. You may be interested to know that at our plant, whichcompleted a contract for shrapnel shells, not a singlelot was rejected, and in only two cases were shells required forsecond proof firing to check the first. This pertains to the-ntire shell, fuse and steel shell combined. At thi<= juncture it will not be amiss to recite in some detail 315 SHRAPNEL PRODUCTION VERSUS PRODUCTION. COMPLETEDAHEAD OF GUARANTEE ( rOTAL ORDER). FEB MAR, APR MAY JUNE lULY 1916 TIME Fig. 12 the probleuLs that confronted ns in loading time fnses, of whichwe manufactured over 3,000,000. The burning time of the fuse is governed by the accuracyof the parts, by the burning time of the powder in the rings,and by the time of igniting this powder through the mediumof the powder pellets. This powder, by the way, is pressed intothe fuse grooves with a pressure of 68,odo pounds per squareinch. The ignition of the powder is accomplished by the useof powder ])ellets, which nuist be uniform, because pellets ofvarying texture take different times to ignite, and may intro-duce at this point a variable in the operation of the fuse. Theignition of the pellet is accomplished by guncotton. The useof guncotton in the pellet may also introduce a variable. For 316 exanjple: it cotton is placed in the pellet too ti;4ln, it, prevents-firing from llie ])rinnr ami interferes with the ii;nit,ion. of thepellet. J he bnrning- time
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