▁cr ushing ▁action ▁of ▁the ▁above ▁forces ▁on ▁cyl ind ers , ▁squares , ▁bars , ▁& c . ▁ ▁Indust rial ▁Architecture .- N atural ▁stone , ▁artificial ▁stone , ▁l imes ▁c ements , ▁br icks , ▁sc aff old ing , ▁& c . ▁▁ ▁Engineering .- Machine · making . ▁- ▁Material s ▁Emp loy ed . ▁– ▁Met als , ▁woods , ▁various ▁materials , ▁where ▁obtained ; ▁means ▁of ▁knowing ▁good ▁and ▁bad ▁quality ▁of ▁materials , ▁principal ▁parts ▁of ▁machines , ▁arrangement ▁ ▁of ▁parts , ▁shape , ▁proportion ▁of ▁weight ▁and ▁size ▁in ▁each ▁piece , ▁various ▁parts ▁for · ▁the ▁transmission ▁of ▁movement , ▁study ▁of ▁the ▁means ▁of ▁obtain ing ▁a ▁regular ▁movement ▁in ▁machines , ▁ordinary ▁regul ators , ▁estimate ▁of ▁the ▁cost ▁of ▁a ▁machine . ▁ ▁Sp in ning ▁and ▁We aving .- Man ufact ure ▁of ▁Text ile ▁Fab rics . ▁T ear ing ▁draft s , ▁fla x , ▁and ▁h emp , ▁spin ning ▁cot ton , ▁spin ning ▁w ool , ▁we aving ▁w ool . ▁ ▁Study ▁of ▁Sp in ning ▁and ▁We aving ▁Est ab lish ments .- St ud y ▁of ▁machines ▁employed ▁in ▁spin ning ▁fla x ▁and ▁h emp , ▁establishment ▁of ▁a ▁fla x ▁and ▁h emp ▁spin ning ▁mill , ▁study ▁of ▁machines ▁used ▁in ▁spin ning ▁cot ton , ▁establishment ▁of ▁a ▁cot ton ▁spin ning ▁mill , ▁study ▁of ▁w ool en ▁spin ning ▁mach in ery