Arrival Of Mortars

ineh mortero lor tho rnortar boats at Cairo, arrived in tbis city irotn Pius. burgh last night. Tbwe morturi aro ofthe Vflrjr lafgest plasa. Thochamlier is thirteeu inehes in diameter, and the extreme diameter of each mórtar issoniething over four feet. The woight of each is nine (ons. Thoro are thirtj eight mortar boats,. - or ' bomb kotches," fis they are called at Cairo, o;ich of which is intendd to carry one of these immens mortiirs. ïho requisite nurriVtcr, we are infonned, has beoo twice matnifaotured at PiUsbniti, btit just as they were ready for shipinent thure camV orders tf end therö to tho Potomac. The laat lot went witb ihe Burnside expedition. The " mortar fíeet' a ít ís called, ísunder the special command ofCaptaiv OooIable, Tormely ol the British navy wtro had cbprgy of a similur fieet in the ('rimen. He has every confidonce inííd " baby-wakere," and is anxiona to use ihrn Fnday last he lefi Cairo i-.)r Pittabnrgli, under orders t tbtain the necesaary arnaamunt and to get ikie mortar boats re-ady for servies ail poesibla dispatcb - ChicagoPost, '28(?t.