W. 8, (SCIENTIFIC AMERICAN, page 148, Jars to principal diameter. With F as a center, describe tiol modified thereby,as advocated in my original com- current volume) will have very little trouble in finding a arc Dn; with a as a center, describe arc n 0; with das muilcation, but there is also the… … quires to be inidth at least twice the diameter of the piece to comb, the partition in the middle might be made by indent- be tempered, alin the bottom several channels are cut or cast cessary. Then will 2 op be points in the required curve. ing paper, waxing it, and suspending it in the framer.…
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